It would be even better if we could add our own graphic files for quick access. Nice app however. A bit pricy if you want the high-res icons. With a little search you can get the same icons free in SVG format.
This application can considerably facilitate the life and work of (not only) web designers and developers. Easy to use, there are a lot of icons in different formats. Despite the fact some formats or sizes are paid, one can find something to his taste in the free section or get the inspiration to create something of his own :)
Handy little app, sits in the menu bar, is easy to use and has a good variety of icons. Note, the 'free' icons are limited to PNG files with a size up to 100. If you want icon sizes over 100 (e.g. 128, 256, 512 etc.) or icon file types other than PNG, then it's an in-app purchase starting at $149.