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Free AI writing and agent tools: Text Auditor, Humanizer, CLAUDE.md Writer, SKILL.md Generator, AI Writing Coach, and more. No account required.
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kiln.tech
Build better AI systems with evals, RAG, agents, synthetic data, fine-tuning, and prompt optimization. Free app + open-source library.
learnclash.com
Learn any topic in 3 minutes a day. 1v1 quiz duels, ELO rankings, spaced repetition. Free on iOS and Android.
livebench.ai
A Challenging, Contamination-Free LLM Benchmark.
go.kolena.com
Download this free LLM Testing Guide.
metareview-8c1.pages.dev
免费在线 Meta 分析工具，5 分钟从数据到森林图。支持 OR/RR/HR/MD/SMD，生成森林图、漏斗图，无需 R 或 Stata。Free online meta-analysis tool with forest plot generator.
github.com
Free open-source SPSS alternative — menu-driven desktop statistics (t-tests, ANOVA, regression, survival analysis, ROC) with SPSS.sav import/export.
octave.org
GNU Octave is a high-level interpreted language, primarily intended for numerical computations.(Free Matlab).
cmusatyalab.github.io
Free and open source face recognition with deep neural networks.
github.com
Free, open-source, self-hosted AI GitHub PR reviewer that runs entirely in GitHub Actions.
palette.fm
Colorize your black and white images within seconds. Try our online AI colorize tool for free, no sign-up needed.
Open-source project that provides AI-assisted learning, courses, tutorials, or study support.
photorestore.ai
Restore old, damaged & faded photos in seconds with AI. Fix scratches, colorize black & white photos, enhance faces. Free to try, no signup.
postwise.ai
Never face writer's block again. AI that transforms your thoughts into viral content for Twitter/X, LinkedIn, and Threads. Start your free trial.
rawgraphs.io
A free and open source tool for data visualization.
remusic.ai
Generate full-length songs in seconds with Remusic - a free AI music generator that generates high-quality tracks up to 4 minutes long instantly.
respeecher.com
Professional AI voice generator for real production workflows, with free testing and flexible integration for studios and media teams.
github.com
100% free, open-source AI code review tool for analyzing git branch differences with comprehensive security, performance, and quality analysis.
github.com
Python-free Rust inference server with OpenAI API compatibility and hot model swapping.
shyeditor.com
Outline, draft, and revise your novel in one place, with editorial feedback and manuscript formatting built in. Free to start.
speechify.com
Speechify reads anything aloud to you. Listen to books, PDFs, or web pages anytime with natural voices. Try Speechify free.
stepbystepml.com
Free online machine learning calculators. Input your dataset and watch algorithms like K-Means, Minimax, and KNN get solved step-by-step for CS exams.
github.com
Any URL to clean markdown for LLMs. Free API, no signup required. Strips JS/CSS and outputs LLM-ready content.
voicetoinstrument.com
Turn your voice into any instrument with AI. Upload vocals and convert to piano, guitar, violin, sax and 100+ instruments. Free online tool.