WhatDisk WhatDisk is an easy-to-use program that helps you categorize your disks (CD's, DVD's, ZIP disks, etc.) into a single, searchable database.
Large Text File Viewer This program was designed for viewing large (>1GB) text files. It uses little memory and is able to open a gigabyte file instantly.
1Tree Basic 1Tree (100% FREE) lets you quickly see/get all directories/files size in 1 tree.