Open Peeps - A hand-drawn illustration library.
Chargebee - Chargebee lets you manage subscriptions and payments at scale, handle custom recurring billing scenarios, reduce subscription churn and simplify accounting.
Control Illustrations - 108 free flat illustrations with customizable characters
Chargify - Chargify is the best online billing software for all of your Recurring Billing needs. Learn more about simplifying your Subscription Billing today.
DrawKit - MIT licensed SVG illustrations, in 2 styles
Recurly - Subscription billing and recurring billing management. Recurly offers enterprise-class subscription billing for thousands of companies worldwide.