There are 10 repositories under conlang topic.
A suite of language tools
ConWorkShop: a conlangs/conworlds management system and community
2016–18 rewrite of the Ayeri Grammar
A community driven philosophical language
A user-friendly online Na'vi dictionary, supporting translations to and from English, German, French, and other languages
A conlang lexicon software made in Python
Generatrum Linguarum, a conlang word generator library
The codebase for the free conlanging app Lexicanter.
Donut, dictionary toolkit
GPLv3 licensed documentation for the constructed languages Ithkuil and TNIL
A linguistic gloss formatter for several mark-up languages.
(Mirror) Official game for Indexing Your Heart.
A curated list of anything releated to linguistics
A command-line sound change applier written in Python.