The Aviation Digital Data Service (ADDS) is a free public service produced by the National Center for Atmospheric Research (NCAR)with funding provided by the FAA’s Aviation Weather Research Program (AWRP) and the NextGen Network Enabled Weather (NNEW) program. The ADDS websites result from the dedication of a handful of scientists and engineers at NCAR and NOAA.  You can read more about the people behind this here.

This site is still in the experimental phase of development but it sure seems to have a lot of potential.  The desktop app is also a very powerful utility.   You can create a log in and make it your own.