Android

GraphView (2010)

https://github.com/arnodenhond/GraphView/

Event Schedule Map (2009)

Hacking at Random
MRMCD0x8
J-Fall

https://androidguys.com/reviews/app-reviews/app-review-qsb-add-ons/

Calculator
Currency Converter
Calendar Input
Tweet Post
URL Shortcut

Teletext (2010)

https://www.bright.nl/nieuws/1111593/de-20-beste-android-apps.html

ReBro (2012)

Broadcast Bridge using Samsung Cord Library SymChat: fully permissionless symmetric chat app

I’m Watch Sync Emulator (2013)

https://en.wikipedia.org/wiki/I'm_Watch

https://github.com/arnodenhond/SyncEmu/

Notificonsole

Execute commands on the command prompt from your notification panel.

SendText

later added as a system feature

LiveFolder Shortcut

app te re-enable discontinued livefolders feature

https://android-developers.googleblog.com/2009/04/live-folders.html