K-9 Mail
Full-featured email clientApache-2.0
Tuta Mail
Encrypted email & calendar service - easy to use, secure by design.GPL-3.0-or-later
Thunderbird: Free Your Inbox
Thunderbird is a 100% Open Source, privacy-focused email app.Apache-2.0
NymVPN – Anonymous No-Log VPN
Private, secure Swiss dVPN. WireGuard, mixnet, decentralized proxy, no email.GPL-3.0-only
Thunderbird Beta for Testers
Thunderbird is a 100% Open Source, privacy-focused email app.Apache-2.0
Kai 9000
OpenClaw alternative in your pocketApache-2.0
Jami
Share, freely and privatelyGPL-3.0-or-later