Platform: <span>macOS</span>

Quassel IRC GPL-2.0 IRC macOS Web v0.14.0 ★ 792 Ergo MIT IRC Linux macOS v2.19.1 ★ 3,357 Listmonk AGPL-3.0 Email Lists Linux macOS v7.0.0-beta.1 ★ 24,153 Stalwart Mail Server AGPL-3.0 Email Servers Linux macOS v1.0.3 ★ 15,733 SimpleX Chat logo SimpleX Chat Private messaging without user identifiers for people needing metadata-resistant chat AGPL-3.0 Messaging Android Linux v7.0.3 ★ 19,644 RetroShare GPL-2.0 Messaging Linux macOS v0.6.7.2 ★ 2,027 OTS Apache-2.0 Messaging Linux macOS v1.23.1 ★ 810 ntfy Apache-2.0 Messaging Linux macOS v2.37.2 ★ 35,307 Centrifugo MIT Messaging Linux macOS v6.10.2 ★ 10,948 AnyCable MIT Messaging Linux macOS v1.6.20 ★ 2,390