Messaging Apps

• 
  BeeBEEP

  Free

  An open source, peer to peer, LAN messenger.

• 
  Chatterino

  Free

• 
  Ekiga

  Free

  An open source SoftPhone, Video Conferencing and Instant Messenger application over the Internet.

• 
  Element

  Free

  Secure and independent communication, connected via Matrix.

• 
  Flock

  Free Trial

  One shared space for all your cross-functional work.

• 
  GoldBug

  Free

  Secure E-Mail Client & Instant Messenger with Multi-Encryption.

• 
  HighSide

  Free Trial

  The secure Slack/WhatsApp alternative for organizations handling regulated/sensitive data.

• 
  Loom

  Free Trial

  Instantly ready to share and watch – at home, in the office, or a bit of both.

• 
  Mesh

  Free

  One messenger for Internet and LAN chat with end-to-end encryption.

• 
  MicroSIP

  Free

  SIP softphone for Windows based on PJSIP stack

• 
  Pidgin

  Free

  A chat program which lets you log in to accounts on multiple chat networks simultaneously.

• 
  RealPopup

  Free Trial

  Provides a comprehensive LAN-based instant messaging solution for local network communication.

• 
  Retroshare

  Free

  Secure communication for everyone.

• 
  Session

  Free

  An end-to-end encrypted messenger that minimises sensitive metadata, designed and built for people who want absolute privacy and freedom from any form of surveillance.

• 
  Snapchat

  Free

• 
  Tox

  Free

  Send messages, files, create groups and make Tox to Tox audio and video calls. Securely.

• 
  Trillian

  Free

  Chat with other Trillian users or those on Facebook, Google, AIM, ICQ, XMPP, Yahoo!, Twitter, and more.