This plugin would be related to the game (DayZ) it would NOT interfere with any other plugins, that I know of, it would add armor weight, stamina, you would need to drink water to survive, and you cannot break trees with your hands. you would need a tool. (but kits would bee needed to get tools) you would be able to get fatigued (not able to place or break blocks & walk slower) You can also break bones from falling from high heights, this would allow you to craft bandages to heal bones, and craft medicine when you catch a cold or sickness, you also need sleep to regine power (Not be fatigued) this also adds gravity to most blocks as well, and fences act as building supports. I can link you this plugin link if you would like (Its free on spigotMC) I think it would be a very cool addition to your towny/survival aspect of your server and would attract some different types of people.
Merchants and Marauders Minecraft