Homerwannabee: I didn't mean to cause any confusion. I was attempting to look for a list of CAG games that are still relatively active, with a decent competitive history behind them. I understand CAG games aren't nearly as popular as other competitive genres, like speed running, or PvP (MOBA, Fighting games, FPS, etc.), so I knew this was going to be tough to do, aside from the obvious ones, like Donkey Kong, Donkey Kong Jr., and Galaga. Don't get me wrong, I do appreciate the CAG games (I have a personal record in Mario Bros of 1,069,760 and 119,920 in Frogger, before I stopped playing those two games, due to other priority commitments).
The reason why I initially asked about this, is because I would rather devote more time to the more competitive games. I am re-attempting to get into the CAG games, competitively, after a few years away from them, and because I want to maximize the value of my time, I want to focus on games that are most active. You might say that I should play a game that I truly love, but besides Mario Bros, there isn't a CAG game that I am particularly in love with. I just love games and competition, as well as the fast-twitch feel and the nostalgia of the older games.
Also, I am aware of MARP. Thanks for the other links, though.