Version Control
Gitlab - https://about.gitlab.com/
Phabricator - http://phabricator.org/
Ticket Management (kanban)
Gitlab Kanban Board - http://kanban.leanlabs.io/
Taiga - https://taiga.io/
Kanboard - https://kanboard.net/
Group Chat
Mattermost - mattermost.org/ - also bundled with gitlab
Rocket.Chat - https://rocket.chat/
Let's Chat - http://sdelements.github.io/lets-chat/
Friends - http://moose-team.github.io/friends/
Zulip - https://www.zulip.org/
Compare: https://blog.okturtles.com/2015/11/five-open-source-slack-alternatives/
Amazon S3 Compatible Alternatives
Minio - https://www.minio.io/
Red Hat Ceph - http://ceph.com/
Password Generator
Diceware - https://www.rempe.us/diceware/#eff
Make Image out of code:
Cabon - https://carbon.now.sh
PaaS
openstack
Kubernetes
Kel - http://docs.kelproject.com/
Doku - http://dokku.viewdocs.io/dokku/
Flynn - https://flynn.io/
More: https://www.quora.com/Is-there-open-source-software-that-implements-Amazon-S3-plug-compatible-storage
Malicatcher
Send email to here for debugging
https://hub.docker.com/r/schickling/mailcatcher/
https://mailcatcher.me/
