Modified version of WhatsApp that expands features beyond what the official app offers.
WhatsApp MOD with features ranging from customization to advanced security.
Portable version of Skype that allows making audio and video calls, as well as sending instant messages, without the need for installation on Windows.

Client for Twitter to keep you up to date with the latest news without having to enter the Twitter website.
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.

Connect to Twitter directly from your Windows with this client.