This isn't a section for something like this, please read http://forums.bukkit.org/threads/read-me-first-plugin-requests-guide.81209/. Anyways, to answer your question. Yes. Use the command '/gamerule keepInventory true'. I believe that is what you want.
No im wanting a plugin that allows me to select a world to enable keepinentory becausemwhen i enable it it enables it on all worlds
The gamerules are done per-world, but if it enables it for all worlds, try to disable all other worlds, enable keepinventory, then load the other worlds again and see if it only applies to one world.
If you use it from console it does it on all worlds. If you use it as a player in the game, it does it for the world you are in. At least that is my experience.
