Skiva is a circle based icon theme for Ubuntu Gnome Shell desktop. It is a work in progress that so far consists of the main Ubuntu folder icons and 19 application icons. I decided to share this personal project with the community in order to get some feedback and encouragement for further development. Inspiration I have drawn from Malyss' Uniblack theme you can find here http://malysss.deviantart.com/art/malys-uniblack-update-11-09-2012-301085946. A wonderful icon theme, but I found the application icons hard to use due to their uniformity in color and style. Skiva is a project that aims to bring a comprehensive circle based icon theme with color and character to the Ubuntu desktop and beyond.
This icon theme is far from being complete, but is actively developed. Get the latest version on GitHub! https://github.com/bparticle/skiva
On Ubuntu install it by extracting the zip file or cloning the repository in ~/.local/share/icons/, or in /usr/share/icons/
Personal use is free. Please contact me for all other uses. Also see http://particle-in-a-box.com/blog-post/skiva-icon-theme