Unofficial version of WhatsApp that offers additional features.
TeamTalk software version that can be run without the need for installation.
Instant messaging app that allows you to send texts, photos, videos, audios, documents, and make voice and video calls, both one-on-one and in groups.
Free, open-source, and distributed communication platform focused on privacy and security.

Connect to Twitter directly from your Windows with this client.
Voice, video, and text communication platform for online communities and collaborative gaming.