From NFLDraftBible.com:
INDIANAPOLIS
WR Rudy Burgess, Arizona State
DE Curtis Johnson, Clark Atlanta
WR Sam Giguere, Sherbrooke Canada
OT Darren Marquez, Southern Illinois
CB Brandon Foster, Texas
DT Dan Davis, UCONN
Interesting that neither Rudolph Hardie nor Titus Brown have been signed by anyone, let alone the Colts. Erin Henderson has not been signed because of durability concerns:
The questions about his durability and past injuries have hurt the status of Maryland junior LB Erin Henderson, according to several league sources.
UPDATE: According to jocre in the comments, Henderson was signed by the Vikings.