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AI for legacy code

Understand and modernize old codebases.

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1Cursor

AI coding agent and editor for ambitious software

Code / DevToolsFreemiumVisit
2Claude Code

Anthropic agentic coding across terminal, IDE, desktop, and web

Code / DevToolsPremiumVisit
3Sourcegraph Cody

AI coding assistant that understands your entire codebase — chat, autocomplete, and code search

Code / DevToolsFreemiumVisit
4Aider

Terminal AI pair programmer with git integration and multi-file editing

Code / DevToolsFreeVisit
5Continue

Open-source IDE AI autocomplete and chat

Code / DevToolsFreeVisit

See also