Here is a iPhone Icon Pack, which will help each iPhone and iPad application developer get his GUI in order. The icons from this set can be used in navigation, tab bars and toolbars of iOS applications.
16 x 16 Office Toolbar Icons pack contains everything you need for the toolbar of your office application
Downloads: 21008 - Demo - Download Now
Extra Folder Icons is a great-looking folder icon pack for Windows that consists of 45 skillfully handcrafted icons, each devoted to a particular activity, class of objects or topic for faster, more intuitive and comfortable navigation.
Downloads: 20520 - Demo - Download Now
Small Glossy Icon collection of professionally drawn clipart and basic toolbar icons. Suitable for any application, user interface (UI icons), png icons are ideal for web design (social networking and business use) and in the creation of templates.
Downloads: 21111 - Demo - Download Now
Large Icons for Vista is a set of smooth and polished icons designed in the same manner as the original Vista icons. The icons come in two versions: with or without shadows and are delivered in various sizes and formats in 256 colors and 32-bit.
Downloads: 20429 - Demo - Download Now
A lot of perfectly flat MS 2013 style icons for multi-platform developers. Perfect Flat Icons are painted carefully, and can be used to enhance desktop software, Web sites and mobile apps made for Microsoft Windows 8.
Downloads: 20382 - Shareware - Download Now