Tacview is described as 'universal flight data analysis tool which enables you to easily record, analyze and understand any flight to improve your skills much faster than with conventional debriefings'. There are six alternatives to Tacview for a variety of platforms, including Online / Web-based, Android, iPhone, iPad and Windows. The best alternative is e-Logbook, which is free. Other great apps like Tacview are SeeYou (Paid), VisuGPS (Free, Open Source), IGC2Map (Free) and LogbookMe (Free).
LogbookMe is an intelligent cloud based platform that logs your trips automatically using GPS and vehicle data. Less work and no fuss logbook solution. Introductory video on Vimeo: https://vimeo.com/169793393
SkyLines is a web platform where pilots can share their flights with others after, or even during flight via live tracking. SkyLines is a sort of social network for pilots including rankings, statistics and other interesting features.