Iconoir is one of the biggest open source libraries with currently 1007 SVG Icons.
Really nice designed outline icons set done by Luca Burgio.
Original Icons are exported as outlines. I have converted outline to fill and used IcoMoon App to make it as icon set ready for Oxygen.
Download them and enjoy!
Thanks to Fahd Mb who created version 1.1.0 and shared with us.