I made these icons a while ago, but they are still requested. So here you can download the free hand-drawn social icon set again. You can use them both personal and commercial.
Download the .rar-file here: 80 Hand-Drawn Social Icons (~5,8 MB, 4 sizes, 80 icons)
80 Hand-Drawn Social Icons by Bálooie is licensed under a Creative Commons Attribution 4.0 International License.