Lem is a general-purpose text editor and IDE written in Common Lisp.
It is designed to be highly extensible and lets users develop and apply extensions while the editor is running. The project has its own approach rather than simply imitating Emacs or Vim, and aims to provide a consistent interface together with real-time interaction between code and its execution state.
This is free and open source software.
Key Features
- General-purpose text editor and IDE written in Common Lisp.
- Highly extensible architecture with extensions that can take effect immediately.
- Supports terminal, webview, and SDL2 frontends.
- Designed to show the results of executed code inline without interrupting editing flow.
- Provides real-time visualization of running code.
- Offers a consistent and customizable interface.
Website: github.com/lem-project/lem
Support:
Developer: lem-project
License: MIT License

Lem is written in Common Lisp. Learn Lisp with our recommended free books and free tutorials.
Related Software
| Emacs-like Text Editors | |
|---|---|
| TeXmacs | High quality scientific word processor and typesetting program |
| Lem | General-purpose editor/IDE |
| vile | Combines aspects of the Emacs and vi editors |
| Zile | Customizable, self-documenting real-time display editor |
| Remacs | Community-driven port of Emacs to Rust |
| JOE | Joe's Own Editor with no code used from Emacs |
| Textbringer | Emacs-like text editor written in Ruby |
| QEmacs | Small but powerful UNIX editor |
| mg | Small, fast, and portable Emacs-like editor |
| ce | Small, fast, Emacs-like text editor |
| JOVE | Jonathan's Own Version of Emacs. Supports many ancient systems |
| Ymacs | Emacs-like code and text editor that runs in a web browser |
| MicroEmacs | Compact Emacs-like text editor |
Read our verdict in the software roundup.
LinuxLinks helps you discover the best free and open source software for Linux. Explore our extensive collection of recommended applications, including alternatives to popular proprietary software.We also publish software reviews, Linux tutorials, hardware reviews, free programming books and articles covering the wider open source community. Browse our Linux resources to discover more. Know a useful free and open source Linux application we haven't covered? Suggest a program for inclusion. Has your software been featured on LinuxLinks? Display one of our Featured on LinuxLinks badges on your website or GitHub README. |


Please read our Comment Policy before commenting.