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lem-project
lem
Common Lisp2016–2026
lem-project / lem

lem

General-purpose editor/IDE with high expansibility in Common Lisp

Developer ToolsLanguages & Compilers
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33Distinct people
49Mentions
0Explicit recommenders
3.1KGitHub stars
REPOSITORY AT A GLANCE

What to know before exploring

What it is

General-purpose editor/IDE with high expansibility in Common Lisp

GitHub

Where it is used

No documented product use was verified in the last source check.

What people are saying

No recommendation phrase was found in the indexed comments.

No classified warning is attached to this page. Read the discussions before treating silence as approval.

Also in these discussions

Mentioned in the same Hacker News threads. That is not proof they are substitutes.

This week on Hacker News

Nov 8–Nov 15 UTC · Direct repository links and separately labeled related project stories. Indexed through 11/15/2026, 4:00:59 PM UTC.

No direct repository links were found in the indexed HN discussions over the past seven days. Older discussions are available below.

Mentions over time

HN mentions by year49 dated mentions

Observed mentions: 2016-12-01 06:19:51 UTC to 2026-07-23 16:22:54 UTC.

0510152016-01-01 00:00:00 UTC to 2017-01-01 00:00:00 UTC (exclusive): 1 mentions; 0 submissions, 1 comments20162017-01-01 00:00:00 UTC to 2018-01-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2018-01-01 00:00:00 UTC to 2019-01-01 00:00:00 UTC (exclusive): 1 mentions; 1 submissions, 0 comments2019-01-01 00:00:00 UTC to 2020-01-01 00:00:00 UTC (exclusive): 3 mentions; 1 submissions, 2 comments2020-01-01 00:00:00 UTC to 2021-01-01 00:00:00 UTC (exclusive): 3 mentions; 0 submissions, 3 comments2021-01-01 00:00:00 UTC to 2022-01-01 00:00:00 UTC (exclusive): 3 mentions; 0 submissions, 3 comments20212022-01-01 00:00:00 UTC to 2023-01-01 00:00:00 UTC (exclusive): 9 mentions; 3 submissions, 6 comments2023-01-01 00:00:00 UTC to 2024-01-01 00:00:00 UTC (exclusive): 7 mentions; 2 submissions, 5 comments2024-01-01 00:00:00 UTC to 2025-01-01 00:00:00 UTC (exclusive): 13 mentions; 0 submissions, 13 comments2025-01-01 00:00:00 UTC to 2026-01-01 00:00:00 UTC (exclusive): 6 mentions; 0 submissions, 6 comments2026-01-01 00:00:00 UTC to 2027-01-01 00:00:00 UTC (exclusive): 3 mentions; 0 submissions, 3 comments. Incomplete calendar period.2026*

* An incomplete calendar period is marked with an outlined bar. Its count is not directly comparable with a full period.

Counts come from the repository’s dated source evidence. Index cutoff: 2026-11-02 08:16:59 UTC.

View mention counts and date ranges
UTC ranges include their start and exclude their end. Select a period to filter the source evidence.
PeriodStart (UTC)End (exclusive, UTC)MentionsSubmissionsComments
20162016-01-01 00:00:00 UTC2017-01-01 00:00:00 UTC101
20172017-01-01 00:00:00 UTC2018-01-01 00:00:00 UTC000
20182018-01-01 00:00:00 UTC2019-01-01 00:00:00 UTC110
20192019-01-01 00:00:00 UTC2020-01-01 00:00:00 UTC312
20202020-01-01 00:00:00 UTC2021-01-01 00:00:00 UTC303
20212021-01-01 00:00:00 UTC2022-01-01 00:00:00 UTC303
20222022-01-01 00:00:00 UTC2023-01-01 00:00:00 UTC936
20232023-01-01 00:00:00 UTC2024-01-01 00:00:00 UTC725
20242024-01-01 00:00:00 UTC2025-01-01 00:00:00 UTC13013
20252025-01-01 00:00:00 UTC2026-01-01 00:00:00 UTC606
2026 (partial)2026-01-01 00:00:00 UTC2027-01-01 00:00:00 UTC303

What Hacker News says

9 sources
vindarel·Nov 4, 2022
Alright, here's my little selection of projects. If you don't see a project in your field it doesn't mean there is no software or library. Are they as awesome as the Rust/Go projects? It depends. Is it an exhaustive list? No. For a list of companies using CL and more projects, old or current, see the other links. ## Music - [OpusModus](http://opusmodus.com/) - a comprehensive computer-aided environment for the whole work of music composition. [Proprietary]. - [OM7](https://github.com/openmusic-project/om7) - a new implementation of the OpenMusic visual programming and computer-aided composition environment including a number of improvements on graphical interface, computational mode, and connection to external software libraries. [GPL3][2]. - [ScoreCloud](https://scorecloud.com/) - A web and mobile application to automatically create musi
Read the rest
c notation from music performance or recordings. Built with LispWorks. ## DB tools - [Pgloader](https://github.com/dimitri/pgloader/) - Migrate to PostgreSQL in a single command!. [PostgreSQL License] - [Pgchart](https://github.com/dimitri/pgcharts) - A self-contained web application that takes as input an SQL query text and outputs its data as a chart. [No License Specified] ## Utils - [Cepl](https://github.com/cbaggers/cepl) - Code Evaluate Play Loop. [2-clause BSD]. - [Regex-coach](http://weitz.de/regex-coach/) - a graphical application for Windows which can be used to experiment with (Perl-compatible) regular expressions interactively. Freeware. ## Text editors - [Lem](https://github.com/cxxxr/lem) - Common Lisp editor/IDE with high expansibility. [MIT]. Works for many languages, has a LSP client. ## Math - [Maxima](https://sourceforge.net/projects/maxima/files/) - Computer Algebra System written in Common Lisp. [GPL2]. - https://github.com/susam/mathb A math pastebin ## Graphics - [Sketch](https://github.com/vydd/sketch) -A Common Lisp framework for the creation of electronic art, visual design, game prototyping, game making, computer graphics, exploration of human-computer interaction, and more. ## Productivity - [Grammarly](https://www.grammarly.com/) - Grammar checking. [Proprietary]. - [Deftask](https://deftask.com/) - Painless task management for teams. [Partly Open Source]. - [Ichiran](https://github.com/tshatrov/ichiran) - Linguistic tools for texts in Japanese language. [MIT]. - [Ballish](https://gitlab.com/ralt/ballish - a pretty fast code search tool. ### Window Manager - [Stumpwm](https://github.com/stumpwm/stumpwm) - The Stump Window Manager. ## Mobile Applications - [ScoreCloud Express](https://apps.apple.com/us/app/scorecloud-express/id566535238) - An iPhone and iPad application that automatically creates music notation from music performance or recordings. ### Games Just 2: - Kandria https://kandria.com/ - [sucle](https://github.com/terminal625/sucle) - A Minecraft clone (voxel game engine). [MIT]. - [Notalone](https://github.com/borodust/notalone) - You wake up nowhere in the night. Hungry zombies around, but your ol' pal "BOOMSTICK" is with you. [GPL3] My selection comes from https://github.com/azzamsa/awesome-cl-software
In Why Lisp?
vindarel·Oct 2, 2022
It is missing the Lem editor, that works for CL out of the box but also for more languages (Python, Rust, Go, Java, Dart, Nim, HTML… and a directory, markdown, SQL, shell… mode). https://github.com/lem-project/lem/ It works on the terminal and in an experimental Electron front-end. More are in the works. It lacks docstrings and documentation, but its gitter chat is somewhat active and different people showed interest in helping. It has a Vim layer. It is an easy to install CL editor and REPL, so it's worth checking out for newcomers, it can help. https://lispcookbook.github.io/cl-cookbook/editor-support.ht...
In Emacs-like editors written in Common Lisp

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