Not really. I have yet to find any good OSS GUI software (don't say Firefox - I am using it but still has lots of UX quirks). Let's take bug tracker as an example. There is ErrBit and while it is in active development and fairly good it is still far from as good as SaaS-alternatives. And for high volume bug trackers, exception handling and log monitoring is something that requires a fair bit of sysop-work to handle.