Added info about core apps

CORE_APPS.md

@@ -0,0 +1,27 @@
+# UBports Core Apps
+
+## Core apps and their maintainers
+
+- [Calculator](https://gitlab.com/ubports/app-dev/calculator-app): [Brian Douglass](https://github.com/bhdouglass)
+- [Calendar](https://github.com/ubports/calendar-app): [Johannes Renkl](https://github.com/hummlbach)
+- [Camera](https://github.com/ubports/camera-app): [Eran Uzan](https://github.com/dark-eye)
+- [Clock](https://github.com/ubports/clock-app): [Eran Uzan](https://github.com/dark-eye)
+- [Contacts](https://github.com/ubports/address-book-app): [Alberto Mardegan](https://github.com/mardy)
+- [Dialer](https://github.com/ubports/dialer-app): [Eran Uzan](https://github.com/dark-eye)
+- [Doc Viewer](https://github.com/ubports/docviewer-app): [Chris Clime](https://github.com/balcy)
+- [File Manager](https://github.com/ubports/filemanager-app): [Bjarne Roß](https://github.com/nfsprodriver)
+- [Gallery](https://github.com/ubports/gallery-app): [Emanuele Sorce](https://github.com/TronFortyTwo)
+- [OpenStore](https://github.com/UbuntuOpenStore/openstore-app): [Brian Douglass](https://github.com/bhdouglass)
+- [Telegram](https://github.com/ubports/telegram-app): [Florian Leeber](https://github.com/Flohack74)
+- [Terminal](https://github.com/ubports/terminal-app): [Walter Garcia-Fontes](https://github.com/wagafo)
+- [UBports Welcome App](https://github.com/ubports/ubports-app): [Jan Sprinz](https://github.com/NeoTheThird)
+
+## Core apps without maintainers
+
+- [Media Player](https://github.com/ubports/mediaplayer-app)
+- [Messenger](https://github.com/ubports/messaging-app)
+- [Morph Browser](https://github.com/ubports/morph-browser)
+- [Music](https://github.com/ubports/music-app)
+- [Notes](https://github.com/ubports/notes-app)
+- [Printing](https://github.com/ubports/ubuntu-printing-app)
+- [Weather](https://github.com/ubports/weather-app)