Lem is a general-purpose editor/IDE extensible in Common Lisp.
Many languages are supported with Lem’s built-in LSP support.
In addition, after installing lem, you can start developing in Common Lisp and extend the editor while it runs.
Feature overview
Keyboard oriented
If you come from Emacs or Vim, you will feel right at home.
Alien Technology
It is an established fact that John McCarthy shared alien tech with the world in 1958 when he introduced us to Lisp. We continue that great tradition.
Lem is written and extensible in Common Lisp.
GUI version with webview or SDL2
Since version 2.0, a GUI version is also available.
It brings graphics and mouse support, as well as games and over 180 colour themes.
The webview will eventually replace the SDL2 version.
Ready for Common Lisp
Start developing on Lisp at once.
Full-featured REPL and interactive debugger, with Paredit and a third-party Pareto (lispy-mode) mode.
Project tree view
Open a tree view of the current project,
use project-aware commands.
and more
Terminal integration, multiple cursors, interactive grep, directory mode, tabs, Git interface, keyboard macros,
and support for:
C, Clojure, Scheme, Go, JavaScript, Kotlin, TypeScript, Python, Rust, Elixir, Haskell, Java, Nim, Dart, OCaml, Scala, Swift, Lua, Perl, Ruby, Zig, WAT, shell, asm…
Markdown, ASCII, JSON, HTML and CSS, Vue, SQL…
