Sponge, from Dare to be Creative Ltd., is a US$26 program designed to look for the space-wasters on your Mac and help you get rid of them cleanly.
The reader comments are also helpful, as there are suggestions for alternative software and methods to assist you in identifying large files and folders for potential deletion, most of which are free.
The other approach is to save the money and software and put it towards purchasing new, 1 TB hard drives which go for around $100 USD.
Methods for reclaiming hard disk space
TUAW reviews Sponge for Mac OS X:
The reader comments are also helpful, as there are suggestions for alternative software and methods to assist you in identifying large files and folders for potential deletion, most of which are free.
The other approach is to save the money and software and put it towards purchasing new, 1 TB hard drives which go for around $100 USD.