Telegram
Smart ManojTelegram X
Android : https://play.google.com/store/apps/details?id=org.thunderdog.challegram
iOS https://itunes.apple.com/us/app/telegram-x/id898228810
Windows: https://telegram.org/dl/desktop/win_portable
Windows Github https://github.com/telegramdesktop/tdesktop/releases/download/v1.7.10/tportable.1.7.10.zip