It was one of my favourite macOS apps. Extremely simple, takes no time to learn, doesn't try to solve every conceivable problem (just sticks to core capabilities).
I see from a hn search it was acquired about 13 years ago: https://hn.algolia.com/?q=skitch
I couldn't find any relevant info from the acquirer's website: https://www.google.com/search?q=skitch+site%3Ahttps%3A%2F%2Fevernote.com%2F+after%3A2022
I wonder if the acquirer could be convinced to open source it? What alternatives are people using?
However, given the fact that it has been abandonware for a long time now, I did look for alternatives for that fateful day when Apple fucks up macOS sufficiently where Skitch is no longer executable, which is not a question of if, but a matter of when.
I decided that CleanShot X was the closest thing to a suitable alternative to Skitch, although it has a number of really annoying design decisions that keep it from being a suitable replacement for Skitch, unfortunately.
If someone could convince the owners of the Skitch IP to open source it, I would be very interested in helping maintain it.
Bending Spoons brought Evernote a few years ago and gutted the entire US based staff.
I’d consider Skitch to be absolutely and permanently dead.