Add Virola Messenger to Communication (#3763)

non-free.md

@@ -45,6 +45,7 @@
 - [Chaskiq](https://chaskiq.io) - Full featured livechat, helpcenter and CRM as an alternative to Intercom & Drift, Crisp and others. ([Source Code](https://github.com/chaskiq/chaskiq)) `AGPL-3.0/Commons-Clause` `Ruby`
 - [Groupboard](https://www.groupboard.com/products/) - Online whiteboard, audio/video conferencing, screen sharing, shared code editing and optional session recording/playback. `⊘ Proprietary` `Unknown`
 - [PrivMX WebMail](https://privmx.com) - Alternative private mail system - web-based, end-to-end encrypted by design, self-hosted, decentralized, uses independent PKI. Easy to install and administrate, freeware, open-source. `⊘ Proprietary` `PHP`
+- [Virola Messenger](https://virola.io/) - Instant messaging and collaboration tool with private and group chat rooms, continuous voice and video meetings, files sharing, issue tracking with integrated task board. Alternative to Slack and others. `⊘ Proprietary` `C++`
 - [WorkAdventure](https://workadventu.re) - Virtual office / virtual conference application presented as a 16-bit RPG video game. ([Demo](https://play.staging.workadventu.re/@/tcm/workadventure/wa-village), [Source Code](https://github.com/thecodingmachine/workadventure/)) `AGPL-3.0/Commons-Clause` `Docker`