ActiveWorkflow.org
turn complex requirements to workflows
Alaveteli
easy FOIA requests for any jurisdiction
BareMetrics.com
v1 of baremtrics.com
Concerto
digital signage system
Diaspora
community-run, distributed social-network
Discourse
next-generation discussion platform
Errbit
open source, self-hosted error catcher
Expertiza
peer-reviews app, supported by the National Science Foundation
FederalRegister.gov
daily journal for the United States Government
GitLab
self hosted Git management
huginn
open-source IFTTT
iNaturalist.org
social network for nature stuff
lobsters
link-aggregation site, inspired by Hacker News
OpenFoodNetwork
software to manage the lifecycle of food
openSNP
annotate your SNP-set
openstreetmap.org
crowd-sourced map of the world
SmartVPN Billing
billing management for hosting
Squash
exception reporting and bug analysis by Square
Teambox
the original teambox.com
va.gov
API for va.gov
zammad
enterprise-ready helpdesk and customer support system