Telegram is like SMS and email combined - fast, versatile and powerful. It is cross-platform app available for Android, Linux, Windows, Mac, and Windows Phone. You can send messages, photos, videos and files of any type (doc, zip, mp3, etc) to people who are in your phone contacts and have Telegram. You can also create groups for up to 200 people. With Telegram you can do all of this on any number of your devices, both mobile and desktop.
For those interested in maximum privacy, It offers Secret Chats, featuring end-to-end encryption to ensure that a message can only be read by its intended recipient. When it comes to Secret Chats, nothing is logged on our servers and you can automatically program the messages to self-destruct from both devices so there is never any record of it.

Sigram is client for telegram which is developed by Sialan.Labs for Linux desktop. It is built using Qt5 and qml languages and released under the General Public License v3.
It offers features like: Send and receive messages; Download photos; Emoticons; Send files; Smart and native notifications; Group chats; Change chat background; Forward and delete messages; Delete and add users to chat groups; Local mute; Show system status of telegram; Inner image viewer with zoom and pan features; Full support for touch monitors; Beautiful user interface with awesome animations; App indicator support for Ubuntu Unity desktop; Show sent, seen, online, offline, last seen, and typing status; and Contacts info pages.
There are still some missing features for this telegram client and these are in to do list of the project: Secret chat; Search for contacts and messages; Add, remove, rename and edit contacts.

To install Sigram Client in Ubuntu 14.04 Trusty/Linux Mint 17 open Terminal (Press Ctrl+Alt+T) and copy the following commands in the Terminal:

To install Sigram Client in Debian/Other Ubuntu & Linux Mint Versions open Terminal and copy the following commands in the Terminal:
>>> 32bit
>>> 64bit
That's it
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