My latest tiny Tracker add-on “Open Origin Package” is now in the HaikuDepot. It shows from which package a file comes from.
Open Origin Package is a Tracker Add-On that finds the package(s) of any selected file(s) and opens it in the preferred application.
By default that is HaikuDepot where you could uninstall the package, or look at its description or the ‘Contents’ tab to see what other files are part of that package and where they are.
The source is available at GitHub.
I’d much rather have this functionality in Tracker’s “Get info” panel, see ticket #10528, but my code-fu is just too lame. 
I’ll happily remove the package again, if anyone solves that ticket…