Software: Basic Pali text processing subroutines?

Dear List Members;

Just want to inquire whether anyone has written subroutines for doing basic processing with Pali language. Including perhaps:

1. Converting string of Pali letters from unicode to Velthius, and vice versa.
2. Joining two Pali letter strings according to Sandhi rules.
3. Taking a root form of a noun or verb and inflecting it, adding endings to it, etc etc...

There are perhaps a lot of issues about how such a subroutines library would be designed. Just wondering whether someone has thought them out. Otherwise i will start from scratch.

I am Using Ruby and Ruby on Rails for speed in development.

Sincerely,
Jon Fernquest