CaPTk is a package that is primarily worked on by the CBICA Software Development team and its collaborators - additional members from the community are welcome!
The easiest way to contribute is by reporting issues is through the GitHub. When reporting an issue, please ensure you fill out as much information from the templates as possible for us to debug and diagnose it.
If you have a particular feature in mind, please submit it via the new Feature Request system via GitHub.
Depending on our bandwidth, one of the team members will get around to it (we will always respond ASAP).
Please feel free to email us at software@cbica.upenn.edu, where we will be more than happy to answer any and all questions.