Icons8 Pichon 9.6.5

135,000+ pixel-perfect icons in 33 popular styles in one desktop application.Pick any icon you need. Choose any color and size. Drag-and-drop it to any design tool. Done.

All the icons are customizable and consistent. Available in many sizes and formats:
Sizes from 25x25 to 500x500 px
Formats PNG, ICO, SVG, PDF, EPS, XAML

What you can do with Pichon:
Search by keywords or browse by category or style
Recolor all the icons in a few clicks
Have all the icons at hand any time since the app works offline

Terms of use:
Basic sizes (up to 100 px) in PNG and ICO are free if you put a link to Icons8.com
Big sizes and vector formats are available with a paid Icons8 subscription

Quotes:
'...proves to be an excellent download software for developers and user interface designers who use Photoshop and Xcode on a daily basis' CNet

'I'm probably late for the party, but this #Icons8 app is one cool tool' @a_felipe_santos

P.S. Before downloading, research what people say about Icons8 on Twitter.