Kaiserreich needs more development but it has stopped developing. The Modern Age Mod has been abandoned after losing a competition with NWO. NWO is still a work in progress yet is the best of them all. Read the descriptions and you'll find out where. These are mods that go into the future or into the past. Victoria II Realism and Rebalance Project: VICKYMOD THE SOUTH WILL RISE FOR REAL.rar If you play PDM, also check out the Divide By Zero submod for PDM.
HPM is currently in development out of the major three. I personally, find that Victoria II Realism and Rebalance Project is the most boring one so I don't play that. I didn't include NNM because NNM is included in /gsg/. PDM changes the game the most, /gsg/ is the most fun of them (my opinion of course, you should try all of them). HPM is the best of them, especially for realism. These are mods that improve the base game.