Communication Tools
1. aMSN
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aMSN is a free open source MSN Messenger clone, with features such as: Offline Messaging, Voice Clips, Display pictures, Custom emoticons, Multi-language support (around 40 languages currently supported),Webcam support, Sign in to more than one account at once, Full-speed File transfers, Group support, Normal, and animated emoticons with sounds, Chat logs, Timestamping, Event alarms, Conferencing support, Tabbed chat windows
2. Tox
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As far as apps that claim “I can do everything Skype can do”, Tox is one of the closest to fulfilling that promise. This app has the big three forms — text chat, video chat, and VoIP calls — and a great interface that beats out Skype in some ways. All of Tox’s communications are 100% free and strongly encrypted. There are no pestering ads nor are there any paid perks. What you see is what you get, and its open even allows you to modify Tox to your liking.
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Platforms: Android, iOS (also Windows, Mac, Linux)
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3. Telegram
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Telegram is another strong alternative to Skype, and like the above apps, Telegram is completely free to use, has no ads, and no paid perks. The downside is that Telegram specializes in text chat and file sending. VoIP calls may be implemented in the future, but no guarantee on that yet.
Communication is between you and your Telegram contacts only and all messages are encrypted. For extra security, you can set certain messages to self-destruct after a given time. Sent files can be of any type, and media can be stored on Telegram’s cloud if needed.
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Platforms: Android, iOS, Windows Phone (also Windows, Mac, Linux, Web)