MSP Open Service Initiative, OpenUEM, and MeshCentral

The Open Service Initiative is all about providing TRULY free, open-source, tools and complete platforms to MSPs. AGPLv3, MIT, and Apache 2 licensed tooling.

https://github.com/Open-Service-Initiative

OpenUEM is an Open-Source Unified Endpoint Manager that is multi-tenant, self-hosted and lets you manage your IT assets thanks to its agents

https://openuem.eu/

The open source, multi-platform, self-hosted, feature packed web site for remote device management. 

https://meshcentral.com/

Penpot open source website prototyping

Penpot is the open source alternative to Figma.  (Figma is a cloud-based design and prototyping tool for websites)

https://github.com/penpot/penpot