ActiveWorkflow.org
turn complex requirements to workflows
Airesis
eDemocracy
alonetone
home for musicians, their tracks and albums
Astuto
customer feedback tool
Autolab
course management and auto-grading of assignments
Binda CMS
headless CMS
Brainstormer.online
collaborative brainstorming
Calls For Proposal App
manage a conference CFP
Catarse
open-source crowdfunding platform
Central
Fulcrum project planning tool fork
CircuitVerse.org
circuit simulator
Coinfi
crypto market intelligence platform
consul
open government and participation software
Covidlist
connect vaccinations with those who need to be vaccinated
Coyote
image annotation
CrimeThinc.com
the app that powers this website
Cuttlefish
a good-enough SMTP server so you can ditch SMTP providers
Danbooru
taggable image board
Datoji
easy JSON mocking for developers
datorss.com
RSS search
DCAF Case Management
case management system
Discourse
next-generation discussion platform
dokno
Rails Engine for storing and managing an app's domain knowledge
Droptune
music notifications for Spotify and Apple Music
Duckrails
tool to mock API endpoints
ebwiki.org
database of police abuse cases against people of color
Envizon
network visualization and pentest reporting
exercism.io
code practice and mentorship
Expertiza
peer-reviews app, supported by the National Science Foundation
Fae CMS
another CMS
Fairmondo
free market place in the hand of the users
Fat Free CRM
a clean, customizable CRM
Feedbin
open-source feed reader for multiple platforms
FeedBunch
simple and elegant reader
fromthepage.com
crowdsource handwritten documents
GitLab
self hosted Git management
Growstuff
tool for small-scale food growers
Gwaphics
graphic design tool
Hackathon Manager
hackathon registration and logistics
Hackershare
social bookmarking and knowledge-sharing
Haven
self-hostable private blogging
Helpy
A Modern Helpdesk Alternative
Hitobito
full-scale group hierarchy management
Hound
Your code, always in style.
icare
carpooling platform
if-me.org
mental health communication
Intercity
web-based Dokku deployment
Lale Help
collaborative platform for refugee support
Locomotive CMS
a multisite CMS with liquid templating
Notebook.ai
structured writing tool
Open Build Service
build service for Linux packages
OpenFarm
open database for farming and gardening knowledge
OpenProject
project management system
openSNP
annotate your SNP-set
openstreetmap.org
crowd-sourced map of the world
Outpost
service directories platform
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
PublicLab.org
collaborative knowledge-exchange platform
Punchclock
simple electronic punch clock
Racing On Rails
bike racing association management
RebelsManager
a platform for social good
Recipy.fr
defunct website of a recipe site
Reservations
equipment loans and reservations software
rubygems.org
The Ruby community's gem hosting service
rubytoolbox.com
catalog of all Rubygems that keeps track of popularity and health metrics
sharetribe
Marketplace platform
Skyderby
flight analysis and competition scoring
SmartVPN Billing
billing management for hosting
Snippet Manager
manage your snippets
Spina
A beautiful CMS for Rails developers
TaxonWorks
workbench for biodiversity informatics
Terrastories
geostorytelling
TimeOverflow
time banking system
vglist.co
video game library tracking
zammad
enterprise-ready helpdesk and customer support system