L-Nix
L-nix is an interactive UNIX tutorial program that teaches beginner to advanced concepts of the UNIX operating system. L-nix includes a simple UNIX shell simulator allowing users to try out commands as they are learned. The L-Nix demo contains 10 modules:Introduction of UNIX, File...
http://www.cybermatrix.com/download/lnix.zip - 615Kb - Download - Screenshot

Advanced Bash Scripting Guide
Complete ebook tutorial and reference on shell scripting with Bash in Linux/UNIX/BSD. This is the equivalent of a 700-page printed book. It is an official Linux Documentation Project (http://www. tldp. org) Guide.
http://personal.riverusers.com/~thegrendel/abs-guide-3.9.tar.bz2 - 783Kb - Download - Screenshot

PowerGREP
Quickly find information in files and folders across your computer or network, even if you do not know in advance exactly what you are looking for. PowerGREP's rich Perl-compatible regular expression support allows you to search for virtually anything by specifying the form of what you want, and... Search through through binary files, Unicode files, UNIX and Mac text files, files stored in zip archives, Microsoft Word documents, Excel spreadsheets, Acrobat PDF files, etc. ... PowerGREP's documentation includes a detailed regular expression tutorial, with many simple and complex examples.
http://www.powergrep.com/cgi-bin/SetupPowerGREPDemo.exe - 4Mb - Download - Screenshot

TextPipe Standard
Slam-dunk the most challenging code or website edit tasks with TextPipe - a powerful text-processing utility that combines more than 100 conversion, translation and filtering operations on multiple text or binary files. Update text using search and replace, which supports perl pattern matching,... More than 100 example filter files are included along with a comprehensive online manual and tutorial. ... Convert files from foreign computer systems between mainframe fixed-length formats and DOS, Macintosh and Unix line-feed formats.
http://www.datamystic.com/textpipestandard.exe - 2Mb - Download - Screenshot