Calyx Institute - non-profit organization that promotes, develops and distributes security and privacy-focused software and technologies. Currently they provide free VPN service, Jabber, SeedVault (backup for Android) and CalyxOS (Android-based). They also support other developers by Microgrands.

Read more: calyxinstitute.org/about

FLOSS.social

For people who care about, support, or build Free, Libre, and Open Source Software (FLOSS).