e-Logbook - Free online GPS / IGC track viewer with flight analysis features.
Tacview - The Universal Flight Data Analysis Tool.
LogbookMe - LogbookMe is an intelligent cloud based platform that logs your trips automatically using GPS and vehicle data.
IGC2Map - Converter .IGC -> GoogleMap to display .IGC format flights on Google Map
SkyLines - Internet platform for flight sharing: Flight Database; Live Tracking; Flight Analysis; Task Planning; Competitions; Achievements; Social Network.
XCSoar - Open-source tactical glide computer for gliders, paragliders, hang gliders and more.