Autolab
course management and auto-grading of assignments
Calls For Proposal App
manage a conference CFP
Coursemology
open-source gameified learning platform
Ekylibre
farm management information system
Expertiza
peer-reviews app, supported by the National Science Foundation
OpenFoodNetwork
software to manage the lifecycle of food
Organization for Transformative Works Archive
archives of fanworks, including fanfic, fanart, and fan vids
Podify
make podcasts from youtube-dl
PublicLab.org
collaborative knowledge-exchange platform
Registry
TLD management software
Upcase.com
learning platform for programming
va.gov
API for va.gov