Notepad++ is a free source code editor (and Notepad replacement), which supports several programming languages, running under the MS Windows environment. I love it and highly recommend giving it go!
 

download link
 
Here are the features of Notepad++ as found on the website :
    Syntax Highlighting and Syntax Folding
   
Supported languages :
C    C++    Java    C#    XML    HTML
PHP    CSS    makefile    ASCII art (.nfo)    doxygen    ini file
batch file    Javascript    ASP    VB/VBS    SQL    Objective-C
RC resource file    Pascal    Perl    Python    Lua    TeX
TCL    Assembler    Ruby    Lisp    Scheme    Properties
Diff    Smalltalk    Postscript    VHDL    Ada    Caml
AutoIt    KiXtart    Matlab    Verilog    Haskell    …

FastStone Image Viewer is one of the best free image viewers, it helps me to get organised and also cuts down the time it takes on some projects. I like the fact it is actually easy to use and easy on system resources, it has no database type feature like google’s picasa. But it is has better features.
Download here. 
Background Reviews:
FastStone Image Viewer 3.2 is a Image Viewer product from faststone.org, get 5 Stars SoftSea Rating, FastStone Image Viewer is an image browser, viewer converter and editor with an easy-to-use interface …

FREE (FREEWARE) SOFTWARE, Free Tools, Scans and Downloads.
 
Comodo has developed a free Anti-Malware software, if it is anything like the firewall we can expect a superior product.
I use and currently recommend Comodo products, this firewall software company sure knows how to please and satisfy fussy computer users.
I like the ease of use and logical interface design that Comodo offers, they also rate on top in international security lab tests. My choice of Virus, Malware and firewall software is aligned to these benchmarks.
One has to balance system resource performance with prevention …