QuincyKit is a feature-rich toolkit that collects crash data from your OS X / iOS applications.
On the client side, QuincyKit provides a way of sending crash reports to your database, giving the user a choice of whether or not to do it.
If the error is known, the user is notified about the status of the fix; the user can also leave his contact details, etc.
On the developer side, QuincyKit’s admin interface can automatically sort crash data, maintain the crash reports, and assign the progress of bugfixes.
QuincyKit looks like it could become an important cool for any serious Mac/iOS developer.