Are you a developer, graphics designer or UX designer and would like to volunteer? That's great! We have several projects that you can contribute to, such as our Pokémon TCG data processing toolset, our content management system (CMS) and future projects such as a deck builder.
The source code of the TCG Collector website/app itself is not publicly available, but it's possible to contribute regarding UX, design and artworks.
Be sure to let us know what your skills are and what you would like to work on. Thanks!