PAFCalc (Planted Aquarium Fertilizers Calculator) for Android is a useful utility that helps in calculations related to DIY fertilizers for planted aquariums. It has been completely written with the Android developer studio, which should ensure portability to tablets and smartphones. The app doesn't access any external functions on your device.
The Source Ruckus Packager (SRP) is a lightweight, yet fully-featured package manager. The target audience for this packager is not the big-time distribution developers, but a single user rolling his or her own at home (or in a small office). This utility is part of the Source Ruckus project.
lcdgrilo is a Grilo-based media player for use on a Raspberry Pi with a PiFace CAD. Because it is based on Grilo, it can play media from any Grilo audio source, including DMAP, Jamendo, and Magnatune. It makes use of the PiFace CAD for input and output through the use of a menu-based interface.