Today's John Moses Brownings'(PBUH) birthday, so a partial list:
U.S. M1895 Colt-Browning machine gun
FN Browning M1899/M1900
Colt Model 1900
Colt Model 1902
Colt Model 1903 Pocket Hammer (.38 ACP)
Colt Model 1903 Pocket Hammerless (.32 ACP)
Colt Model 1905
FN Model 1906 Vest Pocket (.25 ACP)
Remington Model 8 (1906)
Colt Model 1908 Vest Pocket (.25 ACP)
Colt Model 1908 Pocket Hammerless (.380 ACP)
FN Model 1910
U.S. M1911 pistol (.45 ACP)
Colt Woodsman pistol
Winchester Model 1885
Winchester Model 1886
Winchester Model 1887
U.S. M2 .50-caliber heavy machine gun of 1921
A lot of the pistols, and some others, he also designed the cartridges they use.
Note that last in particular, as not only is our military still using it, there's something like fifteen other nations building them under license for theirs(son used it in Iraq, and considers it a marvel).
As Tam noted once, Someday the U.S. Army will have a hovertank with a frickin' laser beam for a main gun, and it will still have an M2HB on a pintle mount above the commander's hatch.