there are so many...
SILVER RELATED
A start:
The TOP ones IMHO:
SLW- Silver Wheaton
PAAS Pan American Silver
SSRI Silver Standard
(more, like: Apex, Coeur D'Alene)
Smaller, Mexican based producers and explorers

Stock Comparison
Symb. Company======= Price Shs.OS C$MktCap
----- Mexgold....... $
KBR.t Kimber Resour. $1.55 xxx.xM $ xx.xMn
FR.v- First Majestic $2.06 xxx.xM $ xx.xMn
EDR.v Endeavour Silv $2.20 xxx.xM $ xx.xMn
SPM.v Scorpio Mining $0.55 xxx.xM $ xx.xMn
MAG.v MAG Silver.... $0.79 xxx.xM $ xx.xMn
SRY.v Stingray...... $0.59 xxx.xM $ xx.xMn
GGC.v Genco Res..... $0.79 xxx.xM $ xx.xMn
MMG.v McMillan Gold. $0.25 xxx.xM $ xx.xMn
TM.v- Tumi Resources $0.43 xxx.xM $ xx.xMn
CNU.v Continuum Res. $0.23 xxx.xM $ xx.xMn
GPR.v Great Panther. $0.48 xxx.xM $ xx.xMn
= =
The GOLD Related list would be far longer