Add IceCat, Wire and Rocket.Chat

tech/foss_alternatives.md

@@ -9,7 +9,10 @@ Quick list lest I forget: I also want to add <https://mycroft.ai> as an alexa/go
 |Proprietary App|FOSS Alternative|License|
 |--|--|--|
 |Telegram/Whatsapp|[Signal](http://signal.org/)|GPL 3.0|
+||[Wire](https://wire.com/en/)|AGPLv3 backend, GPLv3 clients|
 |Discord|[Riot](http://riot.im/)|Apache 2.0|
+||[Rocket.Chat](https://rocket.chat/)|MIT|
+
 
 ## Search Engine 
 ---
@@ -33,6 +36,7 @@ Quick list lest I forget: I also want to add <https://mycroft.ai> as an alexa/go
 |Proprietary App|FOSS Alternative|License|
 |--|--|--|
 |Chrome|[Firefox](https://firefox.com)|Mozilla Public License v2|
+||[IceCat](https://www.gnu.org/software/gnuzilla/)|GPLv3 & MPLv2|
 ||[Chromium](https://github.com/chromium/chromium)|Chromium License|
 ||[Epiphany](https://github.com/GNOME/epiphany)|GNU GPLv2|