![aTalk](https://i.altapps.net/icons/atalk-2d4fa.png)
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Šifrované okamžité správy s videohovormi a funkciami GPS pre Android.
atalk
WebSite:
https://atalk.sytes.net/atalk/Vlastnosti
Alternatívy programu aTalk pre Cloudron s licenciou zadarmo
![Mattermost](https://i.altapps.net/icons/mattermost-fff60.png)
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Mattermost
Mattermost je open source, Shost alternatívou Slack.