a useful tool for building script based selection sets (mayas own are node based, so will only work in the scene you build them in). Selection Sets build with this also allows toggling of selection with ctrl+LMB.
Download it here free:
Currently building a customisable animation toolset (ld_animateMe) which will have a range of useful tools that'll save people time (possibly include links to external tools and ablity to add your own).
Its gotta be simple, quick, customisable and FREE!