Drizzle

Drizzle enables publishers, journalists, and pro-bloggers to sell their premium content directly to readers. Readers can purchase content with a single click and are offered two user-friendly payment options: pay-per-article via micropayments and monthly subscriptions. Drizzle increases direct revenue, reader engagement and the number of paid subscribers. Publishers can automatically track their best performing content and upsell it to their readers in the most effective way.

https://getdrizzle.com