1)   Stock Icons - XP and MAC style icons free 1.0
Original and professional stock icons for your web and software projects. Each stock icon is available in four different sizes and six different extensions. application icons, business icons, corporate icons.

 2)   Aqua Application Icons 1.0
Professional Icons presents this unique and exquisite collection of Mac-inspired icons. Achieve a standardized look and feel while enjoying the benefits of a truly customized interface. Formats ICO, ICNS, PNG, BMP, and GIF are provided.