Giggity is an Android app that loads xcal/Pentabarf XML files (that contain schedules of conferences/festivals/other events) and lets you browse them in various convenient formats.
An early, quite incomplete client for Pump.io which runs on Android Ice Cream Sandwich and later.
SDR Touch turns your mobile phone or tablet into a cheap and portable software defined radio scanner
aeGis is an OSS alternative to other security apps that interact via SMS.aeGis allows you to lock, locate, wipe, and alarm your phone via configurable SMS passphrases.
GNU/Linux Distris als chroot auf Android