Open Peeps - A hand-drawn illustration library.
Design Pickle - Unlimited graphic design services for flat monthly fee
Control Illustrations - 108 free flat illustrations with customizable characters
ManyPixels - Unlimited, on-demand design services for freelancers, startups, and agencies.
DrawKit - MIT licensed SVG illustrations, in 2 styles
Kimp - Kimp is an unlimited design company, specializing in graphic design (including print and digital designs, custom illustrations, landing page designs and email designs) and video design.