I have been following the SB Nation Stampede Blue undrafted free agents for this year and there are a couple really cool prospects. Here is the link to that page and you can refresh for the most recent updates:
The few players that stand out to me are:
Ezell Ruffin, WR, S.D. State
Junior Sylvestre, LB, Toledo
Terrell Hartsfield, DE/DT, OLB, Cincinnati
Hartsfield stands out the most, this kid is a beast. Very strong bull rush and surprisingly fast off the edge. Doesn't overrun plays too much and has a knack for where the balls at. Check out this 9 minute prospect video. I am surprised this guy didnt get drafted... And they are not playing against weak opponents. Not the SEC, but some tough games including East Carolina and Ohio State.