'File Menu Tools', and 'Wintail'

File Menu Tools

Customize the context menu of the Windows Explorer. Add a large number of built-in utilities in order to do operations over files and folders. Add customized commands which let you run external applications, copy/move to a specific folder or delete specific file types.

http://www.lopesoft.com/en/fmtools/info.html

Wintail

Sometimes you need to look at a very large text file, like the 1GB log files on some systems. This program reads the last megabytes of the file without creating a 1 GB swap file.

http://www.elentaris.co.uk/software/index.html