The Unarchiver
http://wakaba.c3.cx/s/apps/unarchiver.html
"The Unarchiver is a much more capable replacement for "BOMArchiveHelper.app", the built-in archive unpacker program in Mac OS X."
NuFile 1.7: The missing "New File" menu
http://www.growlichat.com/NuFile.php
"It adds a new file menu when you right click at a folder"
Mac Geekery - How to Execute Raw Spotlight Queries in the Finder
http://www.macgeekery.com/tips/how_to_execute_raw_spotlight_queries_in_the_finder
'Sometimes you need to do nested queries or more advanced boolean logic than "all or nothing" as the Finder gives, and the Finder gives you a way, though it's a might complicated.'