Links To ...

Packages required by Citrus

gtkmathview
A widget for displaying MathML
Gnome
The GNOME desktop libraries
GTK
The GTK widget set
libxml
The XML library (also known as gnome-xml)

Other Unit Conversion Programs

gonvert
A GTK unit converter. It has a large variety of units and also converts numbers between bases.
KUnit
A KDE unit converter. It's modular and can have a different interface for converting between units in a given dimension group.