Free
Unigram
Open-source Telegram client for PC
Your download will start automatically. If it doesn't, restart it.
Free video and instant messaging app
Unofficial messaging app
Send Group or Bulk SMS with your Own SIM Card
Effortless Communication with Skype Portable
Free Instant Messaging Software for Windows
A free app for Windows, by Arphean Soft.
Sending and receiving SMS from PC via mobile phone
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VidSpeak: Free Chat & Instant Messaging App for Windows
FastTrackNews: Free RSS Feed Reader and News Aggregator