Recent:
Skylimit: A curating Bluesky client (See intro blog post: A Better Way to Read Social Media)
Mahoot: A curation protocol for Mastodon using Pinafore (2022-23)
Historical:
Slidoc: A slide-oriented "personal" Learning Management System
Presentation at American Meteorological Society Python Symposium (2018)
Graphterm: A browser-based graphical terminal interface
Question wheel: Simple Javascript utility to randomly select students in class to ask questions
Enigmail: E-mail encryption plugin for Mozilla Thunderbird, 2001-2003 (Wikipedia page)
Idealized Coupleable Atmospheric Model (ICAM): Zip file containing OLD (1990's) Fortran code for a simplfied climate model, as described in the paper Multiple equilibria, natural variability, and climate transitions in an idealized ocean–atmosphere model