I built a website to view all public frameworks provided by Apple and check their platform availability at a glance.
You can use the filters I predefined for your convenience
or perform advanced searches from text-box filters with operators.
The predefined filter
iOS && !watchOS (to find iOS frameworks not available on the Apple Watch) uses such operators under the hood.
If you would like specific predefined filters to be added, don't hesitate to get in touch with me on Twitter.
I will update the website regularly, and I will also add new (& beta) frameworks once announced.
I was missing such overview with the analytical focus on platform availability and when frameworks were first introduced. Apple's Technology Documentation is rich and covers frameworks but also technologies and articles.
Filtering for frameworks is not possible. Apple offers a filter for "App Frameworks" which only cover a very small subset of all available frameworks.