PromptLayer
Previously listed as free tier · not rechecked
Log and evaluate LLM requests so prompt changes can be measured instead of guessed.
Coding & Dev
These older listings have not been rechecked. Availability and “free” claims may have changed. See source-checked picks
582 tools found
Log and evaluate LLM requests so prompt changes can be measured instead of guessed.
Answer a few skincare questions and get a routine to investigate.
Build a voice assistant you can customize and deploy under your own control.
Search the conversations behind a topic instead of relying only on polished articles.
Turn your notes or a link into flashcards, explanations, and a repeatable study loop.
Describe the places or trip you want and get a map with pins.
Find the right people and write more personal outreach for your job search.
Pick a meme template and let AI suggest a caption.
Search a product and get a clearer picture of what trusted reviews and communities say over time.
Find bugs, improve code, and keep documentation current with an AI coding workspace.
Plan and draft a book with scenes, wikis, beat sheets, and optional AI help.
Turn a skills assessment into focused coaching and a practical growth plan.
Open a small library of writing prompts while you work in an AI writing tool.
Use categorized prompt ingredients and writing formulas to make a vague AI request more specific.
Highlights long, hard-to-read sentences so your writing becomes clear and bold.
A free Microsoft app that reads text aloud and describes people, products and scenes for blind and low-vision users.
Finish a common file or media task in the browser for free.
Draft, revise or discuss material in a chat. Give it your source text and check the result; fluent answers can still contain mistakes.