PalmBible+ is a free software for Bible reading and studying running on PDAs with PalmOS operating system.
The official site of the software is: http://palmbibleplus.sourceforge.net/
Main features of the PalmBible+:
The software has built-in support for Hebrew and Greek languages (respective fonts are includes as resources of PalmBible+), and additional languages can be enabled by means of font plug-ins and Bible text modules.
The PalmBible+ module presented here along with respective fonts allows reading Bible in Church Slavonic. It looks like this:

To read Bible in Church Slavonic you have to download module of the Bible text and set of fonts. The text can be installed either into device memory or into memory card in folder "/PALM/Programs/PPBL/", and the fonts must be installed into device memory.
The text of the Bible is based upon "Slavic Bible" by Fedosov Sergey:
http://come.to/sbible
Additionally, you can download a Russian Synodal Translation (Russian_synodal.zip -- 1.2 Mb). Unlike the other similar module, available in internet, this one uses right book numbering convention, and eliminates connected words problem.
If you wish to see both Russian and Church Slavonic texts at the the same time on screen of your PDA with correct font rendering you can do one of two things (provided that you have localized environment):