HJSplit 3.0
http://hjsplit.en.softonic.com/download
Valve Hammer Editor 3.5
http://www.gamebanana.com/tools/download/4768
Quiz Parampaa
http://www.mediafire.com/?r1c5l58qh832qxw
Jed's Half Life Model Viewer 1.3.6
http://www.ziddu.com/download/15949676/hlmv136_setup.zip.html
NST Plugins Pack
http://www.ziddu.com/download/15949891/NSTPluginsPack.rar.html