German online game created in 1997 that did not changed much since then. Zoccer is not exactly a football manager or football simulation, rather football-themed strategy game.
How does it work? Each team gets pool of goals to "spend" on league games (and in some divisions cup games) each season. Out of them 60% can be used in home games, 40% on away matches. So in each round you have to guess how much goals your opponent will "bet" on this particular match and place at least one more to win.
Those simple rules did not changed much since start of the game, which makes it a bit difficult to compare to actual online football managers, but it is refreshing approach to genre.
There are several leagues available - German Bundesliga, Austria, Swiss league, Swedish, English.