ernr

Get donations without people paying cash.

You can create a mining page easily with ernr - that means simply visiting that page will mine the Monero cryptocurrency on the visitor's computer - with consent.
Payments above 0.3 XMR are processed automatically. There is a flat 0.6% fee taken by supportXMR.com.

Here's an example page.
The only thing you need to get started is a monero wallet. You can make one here