From what I understand online system builder, is only for Saturdays racing which may not be good enough for everyone.

There is a peice of software available on another forum (race horse talk) which allows you to build up your own data using risa form and unitab form. It was written by theAnalyser. I've seen it and it looks ok but haven't played with it too much. Look for a thread called "Computer Calculations and Knowledge Rules for Race". At the beginning of the thread is the program as attachments plus some instructions on install.

Only issue it has no back data, you need to collect your own data each day, and then grab the results at the end of the day. Somthing to do with copyright issues with risa.

Hopefully providing details to a thread on another forum is not against forum rules.