I created a tool [1] to easily convert GitHub gists into bookmarklets and share them. Includes versioning, multi-file gists, etc. Some of my favourite examples hide images until mouseover [2] and play a procedural Brian Eno tune [3].
Thanks, would be cool to have a quick copy button, as these "bookmark me" buttons never work on mobile. With a simple copy button I could create a new bookmark easily on mobile.
I believe I had this at one point but ditched it as browser support was spotty (looking at you, iOS Safari). Looks like support for async clipboard API [1] is getting there so I'll look at adding this functionality back.