adopt-a-hydrant
adopt-a-hydrant software
Amahi
your personal cloud and media server
AppPerf
application and performance monitoring tool
Autolab
course management and auto-grading of assignments
Black Candy
self-hosted music streaming server
Brimir
an email helpdesk
Caffeinate
a framework for easily creating and scheduling email campaigns
Concerto
digital signage system
Do Continuous Integration Yourself
open-source CI server
Duckrails
tool to mock API endpoints
EasyRaceLapTimer
open-source IR lap time tracker
Fat Free CRM
a clean, customizable CRM
FeedBunch
simple and elegant reader
GitReports.com
allow anonymous users to submit bugs to GitHub repos
Heaven
github flow orchestrator
HellRaiser
vulnerability scanner
Hitobito
full-scale group hierarchy management
Juvia
commenting server of the likes of Discus or IntenseDebate
Morph.io
web scraping tool
Motor Admin
if ActiveAdmin and Blazer had a baby
Notebook.ai
structured writing tool
Open-Source Event Manager
event management tool tailored to conferences
Pay
payments engine
PublicLab.org
collaborative knowledge-exchange platform
Radiant CMS
No-frills CMS
RebelsManager
a platform for social good
samson
Web interface for deployments
Sanataro
household accounting software
TagTeam
social tagging for academics
tip4commit.com
reward contributors
Tracks
software for implementing David Allen's Getting Things Done™ methodology