Redmine

Basically the same is when working with tickets.

Our use case: I created custom field "Used technologies" for our projects, so there is bunch of checkboxes like [x] Google API, [x] Instagram, [x] Zendesk, [x] Zend Framework 2, etcetc.
This is useful so you can quickly see which technologies and integrations are used per project.
And now, because people at Instagram are mad, so they remove API for image access, I need to filter all our projects using Instagram API .
But now, it's not possible (it's possible with tickets but not with projects).