Prometheus : Prometheus is an open-source systems monitoring and alerting toolkit originally built at SoundCloud. Prometheus's main features are:
a multi-dimensio...
Lemmy : Lemmy is a selfhosted social link aggregation and discussion platform. It is completely free and open, and not controlled by any company. This means t...
Zulip : Powerful slack-like open source group chat
Kinto : Kinto is a lightweight JSON storage service with synchronisation and sharing abilities.
Isso : Isso – Ich schrei sonst – is a lightweight commenting server written in Python and JavaScript. It aims to be a drop-in replacement for Disqus.
A lightweight, open source, tracking-free comment engine alternative to Disqus.