cal.com : Open source meeting scheduling tool. Send a link, let others book a slot. Calendly alternative.
Plausible Analytics : Plausible is a lightweight and open-source website analytics tool. It doesn’t use cookies and is fully compliant with GDPR, CCPA and PECR.
GitPrep : GitPrep is Github clone. you can install portable github system into unix/linux. You can create users and repositories without limitation.
Uptime Kuma : Uptime Kuma is an easy-to-use self-hosted monitoring tool.
Pa11y : Monitor the accessibility of your websites with pa11y-dashboard, and protect against accessibility errors creeping into your codebase.
