By using existing icons in your business presentations, literature or website you remove the need to hire an expensive illustrator. Hand-Drawn Goods has a awesome selection of icons available for free. If the handrawn look is what you going for be sure to check out their free icons sets:
Brainy Icons Free is a set of 36 hand-drawn free education icons. The icons are available as AI, EPS, PSD and PNG (in 4 sizes: 32×32, 48×48, 64×64, 128×128).
Busy Icons Free is a set of 36 hand-drawn free business icons. The icons are available as AI, EPS, PSD and PNG (in 4 sizes: 32×32, 48×48, 64×64, 128×128).
Hand-drawn interface can be used as a design foundation for a project based on hand-drawn style as well as for wire-framing, layouts and illustration of your ideas.
The set includes hand-drawn vector icons for web interfaces, such as sharing icons: “like icon”, “mail icon” or “pin icon”, social networks icons (“facebook icon”, “twitter icon”, “gplus icon”, “dribbble icon” and “github icon”), general interface icons (like “print icon”, “shopping cart icon” or “settings icon”).
Merry Icons Free is a set of 12 hand-drawn free Christmas icons. It includes Santa Claus, Rudolph the reindeer, Christmas stocking, Christmas bauble, candle, snowflake, Christmas lights, Christmas hat, Christmas tree branch, present, mistletoe wreath and Christmas tree icon.
These free icon sets are available under a Creative Commons Attribution 2.5 License which allows you to use them for personal as well as commercial projects, and make any changes you like. They do ask that you link back to handdrawngoods.com to credit them.
If you like the Hand Drawn Goods icons you can also buy expanded and other sets from them on Creative Market or directly from their website.
While some of their icons are available in icon font formats for flexible web use, I was actually expecting a handwritten font to be included (especially with the UI kit). Then again, typeface design is another discipline and there are a myriad of free handwritten fonts available.