BlockFinder
It's a plugin that allows you to search for currently placed block and It can search in the blocks history too with the help of CoreProtect. It will return, in chat, the position and the player (if it's possible) that has placed/remove the block. If you click on the line, it will teleport you to the position :)
Example
/findblock or /fb and then specify arguments:
b:<blockname1>,<blockname2>... (required) Specify blocks name (example: b:hopper,chest,furnace)... u:<user1>,<user2>... (optional) Specify the list of players who placed/removed blocks. The command will search in the history through CoreProtect plugin. If the plugin it's not found then the plugin will search for ONLY ACTUALLY present block and it will ignore the list. r:<radius> (optional, default radius is 100) The radius in which to search. DON'T SPECIFY TOO LARGE RADIUS TO AVOID SERVER CRASH. -h (optional) It will disable the integration with CoreProtect and the plugin will search only for actually present blocks.
Usage
/fb u:otacon94 b:chest r:20 /fb b:furnace r:1000 -h
Documentation
Documentation and Source to: https://github.com/otacon94/blockfinder/tree/master/BlockFinder
Write in comment for any features would you like ;)