Ilija Studen is an Internet entrepreneur from Novi Sad, Serbia. He is the founder of the development company A51, which is focusing on the development of solutions for companies and individuals that wish to utilize the Internet for increasing productivity and advancing communication.

In June 2006 Ilija has launched activeCollab as an open source project; in 2007 he has transformed into a commercial project with a mission to provide the best possible product and service to its users. activeCollab is used by thousands of people thrughout the world for organizing their projects and improving internal communications.