Below is a list of important weblinks:

Proposal Initiation Form:
https://www.research.uky.edu/collaborative-grant-services/proposal-initiation 

NSF:
http://www.nsf.gov/funding/pgm_list.jsp?org=NSF&ord=date

NIH:
http://grants.nih.gov/grants/funding/submissionschedule.htm

NEH:
http://www.neh.gov/grants/grants.html

NASA:
http://nspires.nasaprs.com/external/solicitations/solicitations.do?method=open&stack=push

Grants Deadline Link on PDO Website:
http://www.research.uky.edu/

Sponsored Project Search Portal:
http://www.research.uky.edu/cfdocs/spif/Search.cfm?CFID=219496&CFTOKEN=93091752