Beaver	The best prog for compiling your maps.
lights.rad	Radiosity stuff.
qbsp2.exe	you know , the BSP thing.
qcsg.exe	another oddly named thing.
qrad.exe	you just know that you need to read the tutorials to understand this stuff....
vis.exe	the last of the odd ones.
QERadiant	QERadiant itself.
update.zip	the update for QER. ( which you need if you want to make HL maps.)
HLQER.zip	The Half-Life plugin for QER.
CSEntities.zip	The special C-S entities.
cstrikefgd.zip	I forgot what this one`s for but I`ve used it somewhere. Let you know soon as I remember.