DraftKings.com

One of the largest Daily Fantasy Gaming sites out there. They offer leagues for fantasy football, baseball, basketball, hockey, golf, soccer, MMA, college football & college basketball.

Currently promoting a Free Entry to a Fantasy Contest. 

How solid is this company? DraftKings.com has a $250 million investment from Disney, which now owns ESPN. You can bet that the Mouse isn't going to let this venture run into the ground.