A concurrent ports building tool.  Although FreeBSD ports supports building a
single port using multiple jobs (via MAKE_JOBS), it cannot build multiple ports
concurrently.  This tool accomplishes just that.

Some of it's key features:
 * Concurrent port building
 * Load control
 * Top like UI
 * Persistent builds (by default)

WWW: http://github.com/DragonSA/portbuilder/