I've also been using this one (wasn't sure at first, they just migrated from the /hlky/ namespace on GitHub), but I have no idea at first glance what the differences are.
I will say that this one has had REALLY active development as new features have been coming out, and is pretty polished at this point (albeit I'm using it more as a toy than anything, but it's awesome to have a quick way to use the new features that have been shipping out).
I will say that this one has had REALLY active development as new features have been coming out, and is pretty polished at this point (albeit I'm using it more as a toy than anything, but it's awesome to have a quick way to use the new features that have been shipping out).