Adobe Acrobat Reader -
http://www.adobe.com/products/acrobat/readstep2.html
Adobe® Reader® is free software that lets you view and print Adobe Portable Document Format (PDF) files on a variety of hardware and operating system platforms.

Ultimatezip -
http://www.ultimatezip.com/download.htm
Ultimatezip is a free file compression software.

Tera Term -
http://www.cast.uark.edu/cast/support/software/tera_term/
Tera Term (Pro) is a free software terminal emulator (communication program) for MS-Windows. It supports VT100 emulation, telnet connection, serial port connection, and so on.

PuTTY SSH/Telnet client -
http://www.chiark.greenend.org.uk/~sgtatham/putty/download.html
PuTTY is a free implementation of Telnet and SSH for Win32 and Unix platforms, along with an xterm terminal emulator.

SurgeForge Free PDF Creator -
http://sourceforge.net/projects/pdfcreator/
PDFCreator easily creates PDFs from any Windows program. Use it like a printer in Word, StarCalc or any other Windows application.

Media player alternatives -
http://www.free-codecs.com

Quicktime Alternative
http://www.free-codecs.com/download/QuickTime_Alternative.htm

Real Alternative
http://www.free-codecs.com/download/Real_Alternative.htm