What are WKO4, Golden Cheetah, Garmin Connect, SportTracks, Training Peaks?

I’ve re-blogged, below, a description from trainingpeaks.com of the differences between their products (WKO4 and TRAINING PEAKS). I’ve used similar power-related features to those in WKO4 in the free Golden Cheetah. The features are awesome and I’m sure will be awesome in WKO4 as well. The best, for a sometimes-slacker like me, is the mFTP…modelled FTP…a CP30 without having to…