Its interface is very simple and includes a wide variety of effects, filters, and tools to achieve professional looking icons. It offers high quality filters such as bisel, drop shadow, and glow; it supports animated cursor editing and lets you manage icon libraries.
Among its options, Greenfish Icon Editor Pro stands out for its format compatibility which allows you to create icons using other images.
Finally, Greenfish Icon Editor Pro comes with an icon library management tool that lets you manage entire libraries from the program itself. Greenfish Icon Editor Pro supports the following formats: ICO, CUR, PNG, XPM, BMP and JPEG.