mbuffer is a tool for buffering data streams. It is also a replacement
for buffer with additional functionality:

- multi-target network output
- on the fly hash calculation
- display of I/O speed
- optional use of memory mapped I/O for huge buffers
- multithreaded instead of sharedmemory ipc
- multi volume support
- autoloader support
- networking support
- command-line options compatible to buffer

WWW: http://www.maier-komor.de/mbuffer.html