Abalone
data tracking and analytics for conservation efforts
ActiveWorkflow.org
turn complex requirements to workflows
adopt-a-hydrant
adopt-a-hydrant software
AirCasting
platform for gathering, visualization and sharing of environmental data
Airesis
eDemocracy
Alaveteli
easy FOIA requests for any jurisdiction
Amahi
your personal cloud and media server
AppPerf
application and performance monitoring tool
BareMetrics.com
v1 of baremtrics.com
Barong
auth server
Bike Index
the internet's bike registry
brief-ideas
journal for brief ideas
Brimir
an email helpdesk
Calls For Proposal App
manage a conference CFP
Case File Editor
editor for digital case files
Catarse
open-source crowdfunding platform
Central
Fulcrum project planning tool fork
Chatwoot
customer engagement platform
Classroom
automates repository creation and access control for teachers
CodeCuriosity.org
platform to reward OSS contributors
Coderwall
Professional network for software engineers
CodeTriage
directory of open-source projects with open issues
Concerto
digital signage system
consul
open government and participation software
CrimeThinc.com
the app that powers this website
Cuttlefish
a good-enough SMTP server so you can ditch SMTP providers
datorss.com
RSS search
Discourse
next-generation discussion platform
Do Continuous Integration Yourself
open-source CI server
Droptune
music notifications for Spotify and Apple Music
Drug Gene Interaction Database
The Genome Institute's drug gene interaction database
Duckrails
tool to mock API endpoints
EasyRaceLapTimer
open-source IR lap time tracker
ebwiki.org
database of police abuse cases against people of color
Ekylibre
farm management information system
Email Dashboard
email suite for marketing and CRM
Envizon
network visualization and pentest reporting
Errbit
open source, self-hosted error catcher
Expertiza
peer-reviews app, supported by the National Science Foundation
Fairmondo
free market place in the hand of the users
Fat Free CRM
a clean, customizable CRM
FederalRegister.gov
daily journal for the United States Government
Feedbin
open-source feed reader for multiple platforms
FeedBunch
simple and elegant reader
FleetYards
A Ship Database and Web API based on the official Star Citizen Ship Matrix
forem
the platform that powers dev.to
fromthepage.com
crowdsource handwritten documents
Growstuff
tool for small-scale food growers
Gwaphics
graphic design tool
Hackathon Manager
hackathon registration and logistics
Haven
self-hostable private blogging
HellRaiser
vulnerability scanner
Helpful
simple and elegant support system
Helpy
A Modern Helpdesk Alternative
Hound
Your code, always in style.
Hours
Time registration that doesn't suck.
HRMS
HR management
Huboard.com
better GitHub issues
huginn
open-source IFTTT
iNaturalist.org
social network for nature stuff
Intercity
web-based Dokku deployment
Juvia
commenting server of the likes of Discus or IntenseDebate
Lale Help
collaborative platform for refugee support
LearnAwesome.org
social network of learners
Lewsnetter
email marketing application
libraries.io
open-source discovery service
Listed.to
online publications with automatic newsletters
lobsters
link-aggregation site, inspired by Hacker News
Loomio
make decisions together
Morph.io
web scraping tool
nokul
solution for universities to manage all the complex procedures of a university online
Notebook.ai
structured writing tool
Notebook Gallery
enterprise Jupyter notebook sharing and collaboration platform
Octobox
GitHub notification manager
OneBody
church management software
OpenFarm
open database for farming and gardening knowledge
openSNP
annotate your SNP-set
Open Source Billing
Beautifully Simple Billing Software
Open-Source Event Manager
event management tool tailored to conferences
pinballmap.com
source code to pinballmap.com
planningalerts.org.au
planning alerts for Australians
Plylst
Spotify playlist tool
Pokr
agile estimating and planning
Postal
mail delivery platform for incoming and outgoing e-mail
Punchclock
simple electronic punch clock
Racing On Rails
bike racing association management
Recipy.fr
defunct website of a recipe site
Registry
TLD management software
Reservations
equipment loans and reservations software
rubytoolbox.com
catalog of all Rubygems that keeps track of popularity and health metrics
samson
Web interface for deployments
Sanataro
household accounting software
sharetribe
Marketplace platform
SmartVPN Billing
billing management for hosting
Snippet Manager
manage your snippets
Staytus
status pages
StockAid
manages inventory for the Grateful Garment Project
sumofus.org
source code to sumofus.org
TagTeam
social tagging for academics
TaxonWorks
workbench for biodiversity informatics
Texterify.com
translation and localization management
TimeOverflow
time banking system
tip4commit.com
reward contributors
Tracks
software for implementing David Allen's Getting Things Done™ methodology
Trado
simple e-commerce platform for developers
uk-postcodes
postcodes application
Upcase.com
learning platform for programming
World Cube Association
everything for the World Cube Association