RemoveEntities

/removeentities OR
/re <types> <radius or rx:ry:rz> [at location x:y:z] [world]

<type> FLAGS for Entities with optional list of EntityType's FLAGS : EntityType , EntityType , EntityType, ...
i - select all dropped items
m - select all monsters except tamed
a - select all animals except tamed
M - select only tamed monsters
A - select only tamed animals
n - select all NPCs
v - select all vehicles
e - select all experience orbs
f - select all falling blocks
x - select all explosives
t - select all primed tnt
p - select all projectiles
r - select all arrows
: EntityType, DROPPED_ITEM. ItemType, ...

<radius> radius from issuer/commandblock location or the location given in the next paramter
radius | radiusX : radiusY : radiusZ

[location] optional - center location for the radius above
locationX : locationY : locationZ

[world] optional - name of the world to be affected by the command
worldname

[verbose] optional - prints out what and where something was removed
true|false

/removeentitiesv and
/rev same as above including verbose option

Permission:
de.kekse23.removeentities

Command examples:
/removeentities i 24
/removeentities :sheep,pig,zombie 24
/removeentities ixp:sheep,pig,zombie 24
/removeentities ixp:sheep,pig,zombie 24 -32:64:-23
/removeentities ixp:sheep,pig,pig_zombie 24 -32:64:-23 world_nether
/removeentities ixp:sheep,pig,pig_zombie 24 -32:64:-23 world_nether true
/removeentitiesv ixp:sheep,dropped_item.diamond,pig,pig_zombie 24 -32:64:-23 world_nether
/removeentitiesv ixpmMA:wolf.!tamed,dropped_item.diamond,horse.tamed,pig_zombie 24 -32:64:-23 world_nether

Usage example: