A while ago I created a set of Ruby scripts called Sassy-Helpers to help automating some tasks when working with larger ODE models. Initially, I just wanted some script to convert back and forth between SASSy models and XPP-Auto.
For converting to a wider range of output formats, there is VFGen by Warren Weckesser, which has a lot of useful features (like computing the Model Jacobian using a symbolic maths library) and supports many more output formats. Therefore, I have added VFGen’s XML format as an output format.
Other new features are: