Abalone
data tracking and analytics for conservation efforts
Action Center
EFF Action Center platform
ActiveWorkflow.org
turn complex requirements to workflows
adopt-a-hydrant
adopt-a-hydrant software
AgileVentures
source code to agileventures.org
AirCasting
platform for gathering, visualization and sharing of environmental data
Airesis
eDemocracy
Annict.com
anime website
AppPerf
application and performance monitoring tool
AskThem
monitor and interact with local government
Astuto
customer feedback tool
Autolab
course management and auto-grading of assignments
Bluedoc
document management tool
Brainstormer.online
collaborative brainstorming
Brimir
an email helpdesk
Calls For Proposal App
manage a conference CFP
Catarse
open-source crowdfunding platform
Central
Fulcrum project planning tool fork
Chaskiq
full-featured live chat, support, and marketing platform
Chatwoot
customer engagement platform
CircuitVerse.org
circuit simulator
Clain for Crown Court Defense
advocacy for defense payments
CodeCuriosity.org
platform to reward OSS contributors
CodeTriage
directory of open-source projects with open issues
Coinfi
crypto market intelligence platform
Concerto
digital signage system
consul
open government and participation software
Coursemology
open-source gameified learning platform
Covidlist
connect vaccinations with those who need to be vaccinated
Cuttlefish
a good-enough SMTP server so you can ditch SMTP providers
DCAF Case Management
case management system
Diaspora
community-run, distributed social-network
Droptune
music notifications for Spotify and Apple Music
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
exercism.io
code practice and mentorship
FabManager
FabLab management tool
Fairmondo
free market place in the hand of the users
Fat Free CRM
a clean, customizable CRM
Fat Free CRM
the original Rails-based CRM
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
Fulcrum
Original project planning
Gamocosm.com
Minecraft server hosting
getsiteinspector.com
a tool for developers to check their pages
Ghostlight Folio
theatrical production management
GitLab
self hosted Git management
Growstuff
tool for small-scale food growers
Hackathon Manager
hackathon registration and logistics
Haven
self-hostable private blogging
Helpful
simple and elegant support system
Helpy
A Modern Helpdesk Alternative
Hitobito
full-scale group hierarchy management
Homeland
homeland.ruby-china.org
Hours
Time registration that doesn't suck.
HRMS
HR management
huginn
open-source IFTTT
Human Essentials
management system for essentials banks
icare
carpooling platform
if-me.org
mental health communication
iNaturalist.org
social network for nature stuff
JobsWorth
Project management, time tracking, billing
Juvia
commenting server of the likes of Discus or IntenseDebate
Lewsnetter
email marketing application
LocalOrbit
local food management stuff
Loomio
make decisions together
LumenDatabase
database of legal complaints and requests for removals
Mastodon
distributed, interconnected microblogging
Mission of Mercy
management of free dental clinics
Morph.io
web scraping tool
Motor Admin
if ActiveAdmin and Blazer had a baby
nindika.com
nintendo switch e-shop
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
OpenFarm
open database for farming and gardening knowledge
OpenFoodNetwork
software to manage the lifecycle of food
Open Source Billing
Beautifully Simple Billing Software
Open-Source Event Manager
event management tool tailored to conferences
OpenSourceRails.org
the codebase to this site
Open Split Time
endurance event data management
Organization for Transformative Works Archive
archives of fanworks, including fanfic, fanart, and fan vids
Outpost
service directories platform
Panoptes
API to support user-defined research projects
Pig CI
Rails performance monitoring, plus CI
pinballmap.com
source code to pinballmap.com
planningalerts.org.au
planning alerts for Australians
Plylst
Spotify playlist tool
Podify
make podcasts from youtube-dl
Pokr
agile estimating and planning
Punchclock
simple electronic punch clock
Pupilfirst
everything you need for an online school
RailsDevs.com
the RailsDevs.com board
RebelsManager
a platform for social good
Recipy.fr
defunct website of a recipe site
Registry
TLD management software
Reservations
equipment loans and reservations software
RubyTogether.org
RubyTogether.org
sharetribe
Marketplace platform
Skyderby
flight analysis and competition scoring
SmartVPN Billing
billing management for hosting
Snippet Manager
manage your snippets
StockAid
manages inventory for the Grateful Garment Project
sumofus.org
source code to sumofus.org
TagTeam
social tagging for academics
Terrastories
geostorytelling
Texterify.com
translation and localization management
TheOdinProject.com
free web development courses
TheyVoteForYou
Holding politicians accountable
TimeOverflow
time banking system
tip4commit.com
reward contributors
Trado
simple e-commerce platform for developers
Trailmix
A place to write.
Twist
book review application
Verboice
Toolkit for people who literally "need a voice"
vglist.co
video game library tracking
Violet
automation, CMS, blog, forum and email thing.
visualizer.coffee
visualize hipster coffee machines
WikiEduDashboard
course dashboard system
World Cube Association
everything for the World Cube Association
Wreeto
note-taking, knowledge management, and wiki