FAA and the like

FAA.gov

FAA Pilots Page

Certifications

Denver Flight Standards

Practical Test Standards

NTSB - Aviation

FAA Air Traffic Plans and Publications

Pilotweb NOTAM System

All Free FAA Chart Products

Digital AFDs

Digital Terminal Procedures

Digital Terminal Procedures Change Notice

IFR Enroute Charts

eCFR's - The Regs/FARs

Temporary Flight Restrictions

Official FAA Acronyms

METAR Observation Code Guide

Federal Meteorological Handbook
Surface Weather Observations and Reports

FAA Physiology of Flight Videos

FAA Survival Videos

FAA Online Libraries

FAA Written Test Materials

Air Traffic Control System Command Center

Restricted Radiotelephone Operators Permit Application - FCC

Associations

AOPA
News, events and articles - great site for all enthusiasts.

NAFI
National Association of Flight Instructors

Colorado Pilot's Association

Aviation Weather.GOV

DUATS

ADDS HEMS Tool

US Real Time Weather Tool

FltPlan.com

Landings.COM

Flightaware.com
Free IFR flight tracking

Skyvector.com
Aeronautical Charts

RunwayFinder.COM
Charts Similar to Google Maps

LiveATC.net
Listen to Live ATC from around the world!

NASA's Inflight Icing Online Course

NASA's Web-based Airfoil Simulator

VOR Simulator

Dual VOR Simulator

HSI Simulator

Online E6B Computer

AOPA CFI Tools

NASA Icing Multimedia Training Courses

AOPA's TSA Flight Training Rules Outline

TSA Flight School and Staff Training

Peak Aviation Center Weight and Balance Computer 
(login: pppc password:pppc)

See How It Flies
Online Book on Flying