Fan out to hackster

README.md

@@ -19,3 +19,8 @@ Projects using RIOT OS
 
 * [Marian's Business Card](https://github.com/maribu/business-card): Hardware description, board support, games and text display software for business card sized board with USB power supply.
 * [Marian's demo boards](https://github.com/maribu/boards): Various PCBs, including an RGB Christmas tree board, along with RIOT board support for most boards.
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+More lists
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+* [Hackster](https://www.hackster.io/riot-os) has an own list of projects using RIOT