There are two plug-ins out there for hide and seek that I was able to find: 'PropHunt' which seems to be abandoned since it hasn't been updated in months, and 'BlockHunt'. BlockHunt isn't updating until Mojang releases there new api. If anyone has the knowledge and wants to make a new Hide and Seek/Prop Hunt plug-in I'd really appreciate it. Suggested Features: Multiple arenas Multiple maps Lobbies, Join signs. Spectating Hider kits Seeker kits Inventory, Armor, XP etc... saving and restoring when joining/leaving games Automated Configurable per-arena Side scoreboard showing time left in the game, what block you are, and if you're a hider or a seeker Max and minimum players per-game, per-arena configurable Permissions to give VIP's to join full games. Maybe a shop for special kits? Winning the game could give you points towards buying them. If a shop is added, permissions to give kits to people via just permission without buying it from the shop. (Shop would be in-game currency, all through the plug-in) It's your plug-in if you make it, these are features I'd personally love added, add whatever else you want too!
I did use tomskis prophunt on my minigames server a while back and since haven't found a replacement but I have been meaning to try fix it, just haven't found the time yet if I do I'll post it here for you.
Okay, I wish someone would either fix it or make a new one, it was a pretty important aspect of my server and now it's broken
There hasn't been an update to BlockHunt since February, and I'd rather not download Lib's Disguises since I use DisguiseCraft. Along with that, the BlockHunt page states 'There will be no more updates until Mojang has released their new api'.
I use DisguiseCraft on my server, so I would rather not switch to Lib's Disguises, also it hasn't been updated since 1.7.2, and with 1.8 coming out tomorrow I'd rather have something that's going to get updated.