WowApp
Wowapp is the best alternative to Skype and you will get paid to use it!
21 Alternatives To WowApp
Another Voice
Voice messaging reinvented for iMessage
App for WhatsApp
Integrated WhatsApp functionality on the Desktop.
Bettergram Messenger
Download an improved version of Telegram desktop with the ability to pin 50 chats, add favorites, view crypto prices, and sort by message category built using the Telegram API
ITALC
With previous products such as iTALC you had to add all computers manually or create scripts for generating XML files which was tedious and error prone.
LINE
LINE is a Japanese proprietary application for instant messaging on smartphones and PCs.
Marco Polo Video Walkie Talkie
Keep in touch on the go, with this walkie-talkie app
NextPlane
NextPlane offers cloud-based, scalable unified communications federation service for the enterprise.
QKSMS
QKSMS is a beautiful communication app that offers magical texting experience.
SafeSwiss Secure Communication
World’s most secure private messaging App. Unbreakable encryption: best App for secret chat, private calls, text, SMS, video, images, data & file transfer
Sesame Chat
A Self-Aware, Digital Assistant that Protects Your Messages
Signal
Fast, simple & secure messaging. Privacy that fits in your pocket.
Talk2Me
Talk2Me allows Push To Talk or Walke-Talkie like functionality for Windows Phone 7 Users.
Telegram
Telegram is a messaging app with a focus on speed and security. It’s superfast, simple and free.
Tinode
Tinode Instant Messaging
Voxer
Turn your phone into a Walkie Talkie. Don’t waste time on phone calls and voicemails.
WWChat
Indie Chat / Messenger for Android
WhatsApp
WhatsApp Messenger: More than 1 billion people in over 180 countries use WhatsApp to stay in touch with friends and family, anytime and anywhere.
Wire
Private & Secure Messenger
Zello
Zello’s push-to-talk app redefines the walkie talkie. It’s a great push-to-talk over cellular (PoC) alternative for businesses and organizations. Learn more about the best walkie talkie app in the market.
Zulip
Powerful open source group chat