These pack includes 868 PNG icons 128x128pixels wide. These wonderful icons are the result of a hard work made by the developer of Oxygen-Icons.org, which will be included within KDE4. The GNOME port has been wonderfully made by nanolx, and widely available on the web.
Everyone is permitted to copy and distribute verbatim copies of this license document, but changing it is not allowed. This version of the GNU Lesser General Public License incorporates the terms and conditions of version 3 of the GNU General Public License.
To install Oxygen-Refit icons within Ubuntu [or on any other Gnome based GNU/Linux distro, like Fedora, Linux Mint, etc.], please refer at this link or my blog.
New free icon set available : eico 1 year.
That's for eicostudio 1 year celebration icon set.
Thanks Ricky made The "Candela" icon lighting others for me
Thanks lvbuwei testing the MAC icon format.
Also you can DL it from [link]