Skype has branched out into different platforms (i.e. TV, IPad and Facebook) and has released an SDK for partners to build Skype into their hardware and software. This required an overhaul of over 100 of its existing icons so that they were no longer dependent on colour or a containing element (i.e. button or background colour). This would allow them to work across multiple platforms and be universal so as not to conflict with partner brands when used with their products.
Each icon was created on a 8x8px grid, conformed to the same rate-to-curve and only used with an angle of 15° increments, creating a consistent and scalable family of icons.