'Contig', and 'Regular Expression Laboratory'

Contig

Contig is a single-file defragmenter that attempts to make files contiguous on disk. Its perfect for quickly optimizing files that are continuously becoming fragmented, or that you want to ensure are in as few fragments as possible.

http://www.sysinternals.com/utilities/contig.html

Regular Expression Laboratory

Regular Expression Laboratory is a simple to use tool to help you learn and prepare regular expressions. If you are a developer or are just concerned with text processing tasks, the Regular Expression Laboratory is a tool that you need. With Regular Expression Laboratory, you can construct your regular expressions with much ease and test them by applying to an arbitrary text. Regular Expression Laboratory supports an incredible 2 MB sized stored regular expression.

http://silveragesoftware.com/rxl.html