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📖 The AI Tool Bible

AI unit test generator

Editorial picks for "generate unit tests with ai".

48 tools

All Coding
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Civitai

Image Generation · Stable Diffusion (SD1.5, SDXL, SD3, Flux, Pony, Illustrious)
8.0

Community hub for Stable Diffusion models, LoRAs, and AI-generated imagery with on-platform generation.

Freemium· Bronze: $10 · Silver: $25 · Gold: $50stable-diffusion-modelslora-discovery
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Keploy

Coding
7.2

Open-source AI testing platform that records real API traffic and replays it as regression tests in CI.

Freemium· Free playground (30 suites, 5 AI credits/mo); Pro $24/user/mo; Enterprise customapi-testingregression-testing
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Keyla.AI

Video
6.8

AI avatar generator for UGC-style product ads, churning out hundreds of video variations from a single brand upload.

Freemium· Basic: $10 · Standard: $20 · Premium: $30ugc-video-adsai-avatars
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Giskard

Evaluation · Multi-model
8.2

Continuous AI red teaming platform that stress-tests LLM agents for vulnerabilities before they hit production.

Freemium· Open-source free tier; Giskard Hub enterprise pricing on requestllm-red-teamingagent-security-testing
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Anyword

Writing · Multi-model
7.2

AI marketing copy platform that scores and predicts content performance before you publish.

Paid· Starter: $49 · Data-Driven: $99 · Business: Custom · Enterprise: Customad-copyemail-marketing
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Promptfoo

Evaluation · Multi-model
7.2

Open-source eval and red-teaming framework for LLM apps, prompts, and RAG pipelines.

Freemium· Community: Free · Enterprise: Custom · On-Premise: Customllm-evalsred-teaming
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Wallaroo.AI

Agents · Multi-model
7.2

Production AI inference platform for deploying and monitoring models across cloud, on-prem, and edge.

Enterprise· Starter: $500 · Wallaroo Community Edition: Free · Ampere Community Edition: Freemodel-deploymentmlops
Jacquard (formerly Phrasee) preview image
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Jacquard (formerly Phrasee)

Writing · Proprietary 'Language2' architecture
7.0

Enterprise AI copywriting platform that generates and optimizes brand-compliant marketing messages at scale.

Enterprise· Custom enterprise pricing; book a demoemail-subject-linesmarketing-copy
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Remusic

Audio · Remusic V4 Pro (proprietary)
7.0

All-in-one AI music studio that bundles song generation, voice cloning, stem splitting, and karaoke tools.

Freemium· Pro: $20.9/mo · Basic: $7.9/mo · Starter: $4.1/motext-to-musicvoice-cloning
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AI Photo Forge

Image Generation · Fine-tuned diffusion (likeness LoRA)
6.9

Telegram-native AI headshot generator that turns selfies into professional portraits inside a chat thread.

Paid· Credit/pack-based (per headshot batch)ai-headshotslinkedin-portraits
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Audify AI

Audio · OpenAI TTS (tts-1, tts-1-hd, gpt-4o-mini-tts)
6.8

Pay-as-you-go web wrapper around OpenAI's text-to-speech voices.

Freemium· BYO OpenAI key (free); or top up from $2 pay-per-usetext-to-speechvoiceover
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PromptPerfect

Writing · Multi-model (GPT, Claude, Stable Diffusion, Midjourney targets)
6.8

Prompt optimizer from Jina AI that rewrites and stress-tests prompts across major LLMs.

Freemium· Free: Free · Pro: $19.99 · Pro Max: $99.99 · Enterprise: Contact salesprompt-optimizationprompt-engineering
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RepublicLabs.AI

Image Generation · Multi-model
6.8

Multi-model AI image and video playground that fans a single prompt out across many generators at once.

Freemium· Basic: $15 · Pro: $30 · Enterprise: Contact salestext-to-imagetext-to-video
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VectorArt.ai

Image Generation
6.8

Text-to-SVG generator that outputs editable, infinitely scalable vector illustrations instead of raster images.

Freemium· Premium: $29 · Unlimited: $99 · API Plan: Contact us for more detailstext-to-svgicon-generation
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Magic Patterns

Coding · Multi-model
6.7

AI prototype generator that turns prompts into production-styled UI mocks for product teams.

Freemium· Free: $0 · Starter: $20 · Business: $100 · Enterprise: Customui-prototypingdesign-to-code
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AI World Bakeoff

Evaluation · Ten frontier coding models (specific list not published on landing page; includes at least one Claude Opus generation referenced as 'Opus 5')

Ten AI coding models, three identical briefs, thirty explorable 3D worlds

Free· Free to view. No paid tiers, sign-up, or accounts.One-shot AI coding model comparison3D generative code benchmarking
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Anakin

Agents · GPT-4o, Claude 3.5 Sonnet, Gemini 1.5, DeepSeek, Mistral, Llama 3

One platform, every model — no-code AI apps and agents

Freemium· Free: $0 · Basic: $9.90 · Pro: $19.90 · Premium: $39.90Multi-model chatbotRAG document assistant
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Artisan

Agents

Autonomous AI BDR that finds leads, personalises outreach and books meetings

Paid· Team / Scale / Enterprise — no public pricing; sales-scoped by monthly leads contacted (~2,500 for Team, ~6,000 for Scale, custom for Enterprise). No public free tier; 'Start free' CTA leads to sales.AI-driven outbound BDR replacementAutomated cold email sequencing
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Crush

Coding · Provider-agnostic: Anthropic Claude, OpenAI GPT, Google Gemini, Groq, Cerebras, OpenRouter, Bedrock, VertexAI, Azure OpenAI, Ollama, llama.cpp, LM Studio, and any OpenAI/Anthropic-compatible endpoint

Glamourous agentic coding for your terminal

Freemium· Free: $0 USD · Team: $4 USD per user/month · Enterprise: $21 USD per user/monthAgentic code refactoring in the terminalMulti-file feature implementation with LSP context
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FastMCP

MCP Servers

The fast, Pythonic way to build MCP servers, clients, and apps.

Free· Free and open source under Apache-2.0; no paid tier for the framework itself. Commercial hosting/scaling optionally available via Prefect Horizon.Wrapping internal REST APIs as MCP tools for Claude DesktopBuilding MCP gateways that federate multiple backends
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GameMaker MCP Server

Agents

Project-aware MCP server that gives AI coding agents structured, guarded access to GameMaker Studio projects.

Free· Free and open source (MIT license). Install via npm/npx.AI-assisted GML refactoringGameMaker project static analysis
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GitRoast

Coding

Brutal AI-generated roasts of GitHub developer profiles

Free· Free to use; hobby project hosted on Vercel with no visible paid tier.roasting your own GitHub profile for a laughteam ice-breakers and stand-up warm-ups
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Goose

Agents · Provider-agnostic — Claude 3.5/4, GPT-4o/4.1, Gemini 1.5/2, Llama 3.x via Ollama, plus Azure OpenAI, Bedrock, OpenRouter and others

Open-source, local-first AI agent for code, workflows, and everything in between.

Free· Free and open source under Apache 2.0. You bring your own model API keys (or run local models via Ollama); provider costs are pass-through.Multi-file code refactors and PR generationLocal repo Q&A and code review
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OneWayInterview

Agents

AI-scored async video interviews for SMB hiring teams

Freemium· Starter: $13.99 · SME: $34.99 · Business: $62.99 · Unlimited: $209.99async video screeningAI candidate ranking
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PearAI

Coding · Model-agnostic via Continue: OpenAI GPT-4o, Anthropic Claude 3.5 Sonnet, Google Gemini, Groq, and local models via Ollama

Open-source AI code editor — a VS Code fork with Continue baked in

Freemium· Intern: Free · Maker: $15/month · Enterprise: Contact UsAI pair programmingcodebase-aware chat
Same.new preview image
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Same.new

Coding · Undisclosed premium frontier models (paid tiers)

Prompt-first AI web app builder that turns a URL or description into a live, hosted full-stack app.

Freemium· Free (500K tokens/mo) / Basic $10/mo (2M tokens) / Pro $25/mo (5M tokens) / Max $50/mo (10M tokens) / Ultra $100/mo (20M tokens, $10 per additional 2M overage). Tokens do not roll over.Cloning a reference site's UI as a starting templatePrototyping SaaS onboarding flows
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Superserve

Agents

Open-source sandbox infrastructure for long-running AI agents

Freemium· Free tier (no credit card required); usage-based: $0.0504/vCPU-hour compute, $0.0162/GiB-hour memory, $0.000108/GiB-hour storageLong-running coding agent workspacesSafe execution of AI-generated code
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Vigla

Agents · Model-agnostic (delegates to the underlying agent's LLM: Claude, GPT, etc.)

Open-source mission control for AI coding agents

Free· Free and open source under Apache-2.0. No paid tiers; users build from source.Supervising multiple AI coding agents in parallelPre-merge audit of agent-generated diffs
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Udio

Audio · Udio (proprietary)
8.8

Suno's main rival for AI-generated full songs.

Freemium· Free; Standard $10/mo; Pro $30/mofull songsmusic demos
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Warp

Coding · Multi-model: OpenAI, Anthropic Claude, Amazon Bedrock, plus BYO via OpenRouter and LiteLLM
8.8

The agentic development environment, from the terminal up

Freemium· Free: $0/month · Build: $20/month · Max: $200/month · Business: $50/user /month · Enterprise: CustomAgentic debugging of failing builds and testsNatural-language shell command generation
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Cline

Coding · Model-agnostic: Claude (Anthropic), GPT (OpenAI), Gemini (Google), DeepSeek, Grok, Mistral, Cerebras, plus local Ollama/LM Studio
8.7

Open-source agentic coding assistant that plans, edits, and runs code inside your IDE

Freemium· ClinePass: $9.99/monthMulti-file feature scaffoldingLarge-scale refactors
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Aider

Coding · BYO (Claude / GPT-4 / Gemini / DeepSeek)
8.4

Terminal-based AI pair programmer that writes commits.

Free· Free / open-source; you pay the underlying LLM API costsCLIgit workflow
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Magnific

Image Generation · Magnific proprietary + Stable Diffusion / Flux finetunes
8.4

Generative AI upscaler and enhancer that hallucinates believable detail into low-res or AI-generated images.

Paid· Premium: €16 · Premium+: €36 · Pro: €230image-upscalingimage-enhancement
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Grain

Audio · Claude, ChatGPT
8.3

AI meeting notes, coaching, and an MCP feed for your agents

Freemium· Free (45-min meeting cap, 90-day history) / Starter ~$15 per user/mo (unlimited meetings, advanced AI) / Business & Enterprise tiers with CRM sync and admin controlsAI meeting notes and summariesSales call transcription and coaching
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Mubert

Audio · Proprietary sample-based generative engine
8.3

AI music generator that spits out royalty-free background tracks for video, podcast, and app use.

Freemium· Ambassador: Free · Creator: $14 · Pro Most popular: $39 · Business: $199background-musicroyalty-free-soundtracks
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Uizard

Image Generation · in-house Autodesigner (proprietary, LLM + diffusion stack)
8.3

AI-powered UI design and prototyping from text, screenshots, or sketches

Freemium· Free: $0 · Pro: $12 · Business: $39 · Enterprise: Contact salesText-to-prototype app mockupsScreenshot-to-editable-mockup conversion
Great Expectations preview image
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Great Expectations

Evaluation
8.2

Open-source data quality framework for validating the datasets that feed your ML and analytics pipelines.

Freemium· Developer: Free · Team: Custom · Enterprise: Contact Salesdata-validationpipeline-testing
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Humanloop

Evaluation · Platform (any LLM)
8.2

Prompt management + evals for collaborative AI teams.

Paid· From $200/mo teamprompt managementteam collab
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AIVA

Audio · Proprietary (AIVA)
8.1

AI music composition tool that generates royalty-friendly tracks in 250+ styles with editable MIDI output.

Freemium· Free; Standard ~€11/mo, Pro ~€33/mo (billed yearly)music-generationsoundtrack-composition
NightCafe preview image
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NightCafe

Image Generation · Multi-model (Flux, DALL-E 3, Ideogram, SDXL, Imagen, Runway, Kling)
8.1

Multi-model AI art generator with a heavy social-network bent and daily community challenges.

Freemium· Basic: $10 · Pro: $20 · Enterprise: Contact salestext-to-imageai-video
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Recraft

Image Generation · Recraft V4.1
8.1

AI image and vector generator built for designers who actually need editable, brand-consistent output.

Freemium· Free tier in Recraft Studio; paid plans and enterprise tier availabletext-to-imagevector-generation
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PromptHub

Writing · Multi-model (OpenAI, Anthropic, Google, Meta, Mistral, Bedrock, Azure)
8.0

Git-style prompt management, testing, and deployment platform for teams running multiple LLMs in production.

Freemium· Free signup; paid team plans (contact sales / in-app)prompt-managementprompt-versioning
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DomoAI

Video · Multi-model (70+ video models)
7.9

Multi-model AI video platform covering text-to-video, image-to-video, style transfer, and talking avatars.

Freemium· Basic: $6.99 · Standard: $19.59 · Pro: $48.99text-to-videoimage-to-video
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Fliki

Video · Multi-model (Veo, Kling, Seedance, Gemini, Minimax, ElevenLabs)
7.9

Text-to-video platform that stitches AI voiceovers, stock footage, and avatars into shareable clips.

Freemium· Free: Free · Standard: Contact sales · Premium: Contact sales · Enterprise: Contact salestext-to-videoai-voiceover
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Devin

Agents · Multi-model (Claude / GPT configurable)
7.8

Cognition Labs' "autonomous software engineer" agent.

Paid· From $500/mo Coreautonomous codingticket resolution
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PromptHero

Image Generation · Multi-model (Stable Diffusion, Midjourney, DALL-E, Sora)
7.7

Searchable prompt library and image generator for Midjourney, Stable Diffusion, DALL-E and other image/video models.

Freemium· Free tier; PRO ~$24.66/mo billed yearly (7,200 credits)prompt-discoverytext-to-image
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Gemini

Writing · Gemini 2.x (Flash / Pro / Ultra)
7.3

Google's flagship multimodal AI assistant with deep integration into Workspace and Android.

Freemium· Free tier; Google One AI Premium $19.99/mo includes Gemini Advancedchat-assistantresearch
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Gorilla

Agents · gorilla-openfunctions-v2 (6.91B)
7.3

Open-source LLM purpose-built for function calling and API invocation across thousands of tools.

Free· Free and Apache 2.0; self-hostedfunction-callingtool-use