BlueSnap (formerly Plimus)is billing aggregator that accepts bank cards, checks and WebMoney.
This add-on will allow you to sell your products, accepting payments through plimus.
Also, add-on will generate a link to which you will be notified, and links for the return of buyers to your site.
In the version of Concrete 5.6.1 can cause error during installation. But should work. Fixed in 18.104.22.168.