Repeater-START (Showing The Amateur Repeaters Tool) is an app to view nearby ham radio repeaters.
It runs on Windows, Android, Ubuntu Linux and Raspbian for Raspberry-pi, Librem Phone, Pinephone/Manjaro Linux etc.
Comunicus is an onscreen tool that pretends to improve the interaction of people with physical and mobility impairments with computers, tablets and smartphones.
Now is in the development fase!
Series60-Remote is an application to manage your mobile phone. You can send and receive SMS messages directly on your computer. It also provides a complex contact and file management.
Astmontray is a systray applet written in PyQt so users can monitor whether their PABX servers running Asterisk.org, the open source telephony platform, are up or not. It supports AMI authentication and runs fine on Linux, OSX and Maemo tablets.