List here:
http://nbadraft.net/2013-early-entry-listList as of 4/21/13
Officially Announced they Will Enter
Alex Abrines 6-6 190 SG Spain 1993 [link] Late first to second round.
Steven Adams 7-0 250 C Pittsburgh Fr. [link] Late first to early second.
Giannis Adetokoubo 6-9 215 SF Greece 1994 [link] Lottery to early second.
Athanasios Adetokoubo 6-7 205 SG/SF Greece 1992 [link] Second round to undrafted.
CJ Aiken 6-9 192 SF/PF St. Joes Jr. [link] Likely undrafted.
Anthony Bennett 6-7 240 PF UNLV Fr. [link] Top 10 pick.
Vander Blue 6-3 180 SG Marquette Jr. [link] Mid second round to likely undrafted.
Lorenzo Brown 6-4 190 PG NC State Jr. [link] Late first to second round.
Reggie Bullock 6-5 180 SG North Carolina Jr. [link] Second round to undrafted.
Trey Burke 6-0 180 PG Michigan So. [link] Lottery to mid first.
Kentavious Caldwell Pope 6-5 205 SG Georgia So. [link] Mid to late first round pick.
Michael Carter Williams 6-6 190 PG Syracuse So. [link] Mid to late first round pick.
Adrien Coleman 6-5 190 SF Bethune Cookman Jr. Likely undrafted.
Allen Crabbe 6-6 190 SG California Jr. [link] Late first to early second.
Gorgui Dieng 6-10 245 PF/C Louisville Jr. [link] Late first to early second.
Laszlo Dobos 7-3 260 C Hungary 1993 Likely undrafted.
Jamaal Franklin 6-5 185 SG/SF San Diego St. Jr. [link] Late first to early second.
Rudy Gobert 7-1 230 C France 1992 [link] Late lotto to late first round pick.
Archie Goodwin 6-4 190 SG Kentucky Fr. [link] Late first to early second.
Tim Hardaway Jr 6-5 190 SG Michigan Jr. [link] Late first to early second.
Mouhammadou Jaiteh 6-11 249 C France 1994 Second round to undrafted.
Grant Jerrett 6-10 230 PF Arizona Fr. [link] Mid second round to likely undrafted.
Myck Kabongo 6-1 180 PG Texas So. [link] Late first to likely second round.
Sergey Karasev 6-8 190 SG/SF Russia 1993 [link] Late first to second round.
Ricardo Ledo 6-5 185 SG/SF Providence Fr. [link] Second round to undrafted.
Alex Len 7-1 240 C Maryland So. [link] Top 10 pick.
CJ Leslie 6-8 200 SF/PF NC State Jr. [link] Late first to second round.
Nurideen Lindsey 6-2 180 PG Rider So. [link] Likely undrafted.
Amath Mbaye 6-8 210 SF Oklahoma Jr. [link] Mid second round to undrafted.
Ben McLemore 6-5 201 SG Kansas Fr. [link] Top 3 pick.
Tony Mitchell 6-8 235 SF/PF North Texas So. [link] Late first to early second.
Shabazz Muhammad 6-6 225 SF UCLA Fr. [link] Lottery pick.
Nerlens Noel 6-11 208 PF Kentucky Fr. [link] Top 3 pick.
Lucas Nogueira 7-0 220 PF Brazil 1992 [link] Late first to early second.
Victor Oladipo 6-4 190 SG/SF Indiana Jr. [link] Top 10 pick.
Kelly Olynyk 7-0 240 C Gonzaga Jr. [link] Lottery to mid first.
Norvel Pelle 6-10 240 PF/C Iona Fr. [link] Likely undrafted.
Otto Porter 6-8 205 SF Georgetown So. [link] Top 10 pick.
Marshawn Powell 6-7 240 PF Arkansas Jr. [link] Likely undrafted.
Phil Pressey 5-11 180 PG Missouri Jr. [link] Likely undrafted.
Dario Saric 6-10 230 PF Split Croatia 1994 [link] Mid to late first round pick.
Dennis Schroeder 6-2 168 PG Germany 1993 [link] Late first to early second.
Tony Snell 6-7 195 SF New Mexico Jr. [link] Second round to undrafted.
Tahj Tate 6-4 190 SG Delaware State So. Likely undrafted.
Adonis Thomas 6-6 235 SF Memphis So. [link] Second round to undrafted.
DeShaun Thomas 6-7 221 SF/PF Ohio State Jr. [link] Late first to early second.
BJ Young 6-3 175 SG Arkansas So. [link] Second round to undrafted.
Cody Zeller 6-11 240 PF/C Indiana So. [link] Top 10 pick.
Other notable players considering NBA/haven't yet stated they're staying at their school:
Isaiah Austin 7-0 205 PF/C Baylor Fr. Late first to early second.
Ray McCallum 6-1 190 PG Detroit Jr. Mid second round to undrafted.
Doug McDermott 6-7 225 SF Creighton Jr. Mid to late first round pick.
Adreian Payne 6-9 230 PF Michigan St. Jr. Late first to early second.
Chane Behanan 6-7 240 PF Louisville So. Mid second round to likely undrafted.
Clint Capela 6-9 230 PF Switzerland 1994 Mid second round to likely undrafted.
DeWayne Dedmon 7-0 250 C USC Jr. Mid second round to likely undrafted.
Eric Ferguson 6-8 204 SF/PF Georgia Southern Jr. Mid second round to likely undrafted.
Livio Jean Charles 6-9 210 SF France 1993 Second round to likely undrafted.
Cory Jefferson 6-9 240 PF Baylor Jr. Second round to undrafted.
Maximilian Kleber 6-10 210 SF Germany 1992 Second round to undrafted.
Shane Larkin 5-11 186 PG Miami So. Late first to early second.
Shabazz Napier 6-1 181 PG UConn Jr. Mid second round to likely undrafted.
Andre Roberson 6-7 210 SF/PF Colorado Jr. Mid second round to undrafted.
Russ Smith 6-0 180 PG/SG Louisville Jr. [link] Mid second round to likely undrafted.
Jarnell Stokes 6-7 250 PF Tennessee So. Mid second round to undrafted.