All the loops here are licensed under the Public Domain (CC0). You can download the source files in packs of 10, the numbers correspond to the numbers on the videos, which can be downloaded from the links under the previews.
I'm putting them up a little rushed due to a number of requests so they're a little rough around the edges, but they should all render fine. In some cases, you might have to re-link an ABC or PC2 animation cache, in others it'll be necessary to bake a Dynamic paint cache. If you find any files that aren't working, let me know and I'll look in to it.
Other than that, enjoy! :)