Add descriptions.

README.md

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 ## IDEs
 
-- [Cursor](https://www.cursor.so/)
+- [Cursor](https://www.cursor.so/) — An IDE (fork of VSCodium) with chat, edit, generate and debug features. Uses OpenAI.
 - [Magnet](https://www.magnet.run/)
 
 ## Assistants
 
-- [GitHub Copilot X](https://github.com/features/preview/copilot-x)
-- [Replit Ghostwriter Chat](https://replit.com/site/ghostwriter)
+- [GitHub Copilot X](https://github.com/features/preview/copilot-x) — A VS Code extension with chat, pull request text generation, and unit test generation.
+- [Replit Ghostwriter Chat](https://replit.com/site/ghostwriter) — An assistant with chat, proactive debugging, and autocomplete. Uses OpenAI for chat and [replit-code-v1-3b](https://huggingface.co/replit/replit-code-v1-3b) (OS) for autocomplete.
 - [Refact AI](https://refact.ai/)
 - [Source Graph Cody](https://about.sourcegraph.com/cody)
 - [Continue](https://continue.dev/)
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 ## Documentation
 
-- [Trelent](https://trelent.net/)
+- [Trelent](https://trelent.net/) — A VS Code extension to generate docstrings. Uses proprietary models.
 - [Docify](https://docify.ai4code.io/)
 - [Mintlify Writer](https://writer.mintlify.com/)
 
 ## GitHub bots
 
-- [BitBuilder](https://www.bitbuilder.ai/)
+- [BitBuilder](https://www.bitbuilder.ai/) — A GitHub integration to generate pull requests from issues.
 - [Sweep](https://sweep.dev/)
 - [Code Review GPT](https://github.com/mattzcarey/code-review-gpt)
 
 ## Agent platforms
 
 - [E2B](https://www.e2b.dev/)
-- [Morph Rift](https://github.com/morph-labs/rift)
+- [Morph Rift](https://github.com/morph-labs/rift) — A VS Code extension that allows merging the output of code generation agents.
 - [SuperAGI](https://superagi.com/)
 
 ## Agents
 
-- [Smol Developer](https://github.com/smol-ai/developer)
-- [Aider](https://github.com/paul-gauthier/aider)
+- [Smol Developer](https://github.com/smol-ai/developer) — An agent that generates an entire repository from a text description. Uses OpenAI and Anthropic.
+- [Aider](https://github.com/paul-gauthier/aider) — An agent that generates changes and commits to repositories. Uses OpenAI.
 - [Mentat](https://www.mentat.codes/)
 - [GPT Engineer](https://github.com/AntonOsika/gpt-engineer)
 - [GPT Migrate](https://github.com/0xpayne/gpt-migrate)