Visit 16pxls.com to grab them.
I've used multiple icon sets both free and premium. Each one has helped me solve problems, and produce great interfaces.
I have decided to give back, in the hope that I can help others create great things...
What started as Tumblr icons for posts, is quickly progressing to a larger set. I aim to add even more (in fact I have), and will hopefully release them as both a .sketch file and icon font.