Q died from heart disease, aged 43, and the hip-hop world is remembering the Internet visionary who helped promote rap talent on his video sharing website.
"You are amazing... you are a inspiration to all of us," DJ Khaled wrote on Instagram. "Thank you for always supporting me from day 1 on everything I have been apart (sic) of... every time I see you I made sure I thanked you! My prayers go out to you and your family."
T.I. added, "God bless ya family & friends. You was a real solid, stand-up dude. We can't thank you enough for all you've done for all of US!!! You were always pleasant & positive through all the madness. You built a brand that changed the course of culture. Your legacy will live on... Rest Easy King."
2 Chainz posted a photo of himself and Q on Instagram, and wrote: "This picture was taken 1 week ago God bless you and your family REST IN PEACE."
Other tributes posted up on social media have come from the likes of Juelz Santana, Lil B, and Juicy J.
O'Denat launched WorldStarHipHop in 2005. The website provided upcoming artists with a platform to showcase their talents through music videos and mixtapes.