Bullets:

Mass Produced Bullets:

Sierra Bullets: http://www.sierrabullets.com
Lapua Bullets: http://www.lapua.com
Hornady Bullets: http://www.hornady.com
Nosler Bullets: http://www.nosler.com
Barnes Bullets: http://www.barnesbullets.com

Custom Bullets:
Berger Bullets: http://www.bergerbullets.com
JLK Bullets: http://www.okweber.com/bullets.asp
Shilen Bullets: http://www.shilen.com
Starke Bullets: http://www.starkebullets.com
Bruno Bullets: http://www.brunoshooters.com
Fowler Bullets: http://www.benchrest.com/fowler/
Lost River Ballistic Bullets: http://www.lostriverballistic.com/

Brass:

Winchester Brass: http://www.winchester.com
Remington Brass: http://www.remington.com
Hornady Brass: http://www.hornady.com
Federal Brass: http://www.federalcartridge.com
Lapua Brass: http://www.lapua.com/index.htm
Norma Brass: http://www.norma.cc/normawebNY/index.htm

Powder:

Accurate Powder: http://www.accuratepowder.com
Alliant Powder: http://www.alliantpowder.com
Goex Powder: http://www.goexpowder.com/index.html/
Hodgdon Powder: http://www.hodgdon.com
IMR Smokeless Powder: http://www.imrpowder.com
Norma Powder: http://www.norma.cc
Pyrodex Powder: http://www.pyrodex.com
Vihtavuori Powder: http://www.lapua.com/vihtavuori/
Winchester Powder: http://www.winchester.com

Ballistics Programs:

On-Line:

JBM Ballistics Calculator: http://internet.cybermesa.com/~jbm/ballistics/ballistics.html
Norma Ballistics http://www.norma.cc/normawebNY/index.htm (Click English Button)

Purchase:

Pejsa Ballistics: http://www.pejsa.com/
Oehler's Ballistic Explorer: http://www.oehler-research.com/milek.html
QuickLoad/QuickTarget: http://www.neconos.com/details3.htm