huginn
open-source IFTTT
Postal
mail delivery platform for incoming and outgoing e-mail
Errbit
open source, self-hosted error catcher
Feedbin
open-source feed reader for multiple platforms
sharetribe
Marketplace platform
Helpy
A Modern Helpdesk Alternative
TheOdinProject.com
free web development courses
Loomio
make decisions together
Staytus
status pages
Duckrails
tool to mock API endpoints
Catarse
open-source crowdfunding platform
samson
Web interface for deployments
OneBody
church management software
Brimir
an email helpdesk
if-me.org
mental health communication
Classroom
automates repository creation and access control for teachers
Cuttlefish
a good-enough SMTP server so you can ditch SMTP providers
Juvia
commenting server of the likes of Discus or IntenseDebate
Hours
Time registration that doesn't suck.
Squash
exception reporting and bug analysis by Square
OpenFarm
open database for farming and gardening knowledge
Open-Source Event Manager
event management tool tailored to conferences
Autolab
course management and auto-grading of assignments
Open Source Billing
Beautifully Simple Billing Software
adopt-a-hydrant
adopt-a-hydrant software
CircuitVerse.org
circuit simulator
iNaturalist.org
social network for nature stuff
HellRaiser
vulnerability scanner
rubytoolbox.com
catalog of all Rubygems that keeps track of popularity and health metrics
Haven
self-hostable private blogging
Envizon
network visualization and pentest reporting
Morph.io
web scraping tool
AppPerf
application and performance monitoring tool
Wreeto
note-taking, knowledge management, and wiki
Concerto
digital signage system
Alaveteli
easy FOIA requests for any jurisdiction
LearnAwesome.org
social network of learners
Plylst
Spotify playlist tool
Lewsnetter
email marketing application
Human Essentials
management system for essentials banks
alonetone
home for musicians, their tracks and albums
Notebook.ai
structured writing tool
Central
Fulcrum project planning tool fork
Covidlist
connect vaccinations with those who need to be vaccinated
SmartVPN Billing
billing management for hosting
Bike Index
the internet's bike registry
World Cube Association
everything for the World Cube Association
Datoji
easy JSON mocking for developers
Podify
make podcasts from youtube-dl
weg.li
report bad german parkers
Coderwall
Professional network for software engineers
Gwaphics
graphic design tool
Expertiza
peer-reviews app, supported by the National Science Foundation
Gamocosm.com
Minecraft server hosting
Helpful
simple and elegant support system
tip4commit.com
reward contributors
openSNP
annotate your SNP-set
Trado
simple e-commerce platform for developers
Notebook Gallery
enterprise Jupyter notebook sharing and collaboration platform
Amahi
your personal cloud and media server
AgileVentures
source code to agileventures.org
Email Dashboard
email suite for marketing and CRM
Reservations
equipment loans and reservations software
Coursemology
open-source gameified learning platform
Airesis
eDemocracy
FederalRegister.gov
daily journal for the United States Government
Intercity
web-based Dokku deployment
Texterify.com
translation and localization management
Fairmondo
free market place in the hand of the users
Do Continuous Integration Yourself
open-source CI server
EasyRaceLapTimer
open-source IR lap time tracker
Listed.to
online publications with automatic newsletters
Droptune
music notifications for Spotify and Apple Music
brief-ideas
journal for brief ideas
Drug Gene Interaction Database
The Genome Institute's drug gene interaction database
CodeCuriosity.org
platform to reward OSS contributors
FeedBunch
simple and elegant reader
TagTeam
social tagging for academics
BareMetrics.com
v1 of baremtrics.com
planningalerts.org.au
planning alerts for Australians
StockAid
manages inventory for the Grateful Garment Project
RebelsManager
a platform for social good
Huboard.com
better GitHub issues
Coyote
image annotation
Pokr
agile estimating and planning
Sanataro
household accounting software
sumofus.org
source code to sumofus.org
Racing On Rails
bike racing association management
uk-postcodes
postcodes application
FleetYards
A Ship Database and Web API based on the official Star Citizen Ship Matrix
OpenSourceRails.org
the codebase to this site
Registry
TLD management software
Abalone
data tracking and analytics for conservation efforts
Hackathon Manager
hackathon registration and logistics
Lale Help
collaborative platform for refugee support
TalentProtocol.com
be your own NFT
Brainstormer.online
collaborative brainstorming
Pig CI
Rails performance monitoring, plus CI
Outpost
service directories platform
Ghostlight Folio
theatrical production management
Case File Editor
editor for digital case files