Plug-ins for an interesting game! [Help]

Hello, I keep the server minecraft, and it works on craftbukkit. Number of online used to be 30-40 people, but now down to 10 maximum. Many say that is not interesting to play, help solve the problem. What plug-ins supplied for an interesting game on the server? Thank you.

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EDIT by Moderator: merged posts, please use the edit button instead of double posting.

 

You cant just have an interesting server, you have to work at it, have things there that people enjoy, so well planned structures, adequate anti greifing tools. I also suggest the piston plugin

 

First, set up a solid defense against griefers by using plugins such as WorldGuard, Residence, Essentials, etc.

Next, Install functionality plugins. What is the theme? Creative, RPG, SMP?

Finally, to make things more interesting maybe get some plugins from here