Pilot’s Handbook of 
Aeronautical Knowledgehttp://www.faa.gov/library/manuals/aviation/pilot%5Fhandbook/

Fly the LV Sky blog:

Federal Aviation Regulations (FAR’s)http://flythelvsky.tumblr.com/
Federal Aviation Regulations (FAR’s)http://www.faa.gov/regulations_policies/faa_regulations/
FAA Scholarships & Grants Index
FAA Safety Team (FAAST)http://www.faa.gov/education/student_resources/scholarships_grants/index.cfm
AOPA Air Safety Foundation (ASF)http://www.faasafety.gov/
Instrument Flying Handbookhttp://www.aopa.org/asf/
Rotorcraft Flying Handbookhttp://www.faa.gov/library/manuals/aviation/instrument_flying_handbook/
Aviation Instructor’s Handbookhttp://www.faa.gov/library/manuals/aircraft/media/faa-h-8083-21.pdf
Aviation Instructor’s Handbookhttp://www.faa.gov/library/manuals/aviation/aviation_instructors_handbook/media/FAA-H-8083-9A.pdf
Aviation Weather Handbookhttp://rgl.faa.gov/Regulatory_and_Guidance_Library%5CrgAdvisoryCircular.nsf/0/C2DF8D9D7471617786256A020078083A?OpenDocument
Aviation Weather Serviceshttp://www.faa.gov/documentLibrary/media/Advisory_Circular/AC-0045G_chg1_fullDocument.pdf