Redis
Used by 4 peopleredis.io ↗

“I am using Redis a lot for Pub/Sub type operations and Ruby for desktop and web apps that control, for example, ordering and ticketing systems.”
Jonas M. Luster Interview, Food scientist (el Bulli), developer · via Uses This 
“I'm Salvatore Sanfilippo, 33, and I'm a programmer working for VMware developing Redis, a NoSQL open source database.”
Salvatore Sanfilippo Interview, Software developer (Redis) · via Uses This