This is what I have so far. Feel free to move stuff around or make new categories or whatever. I think this is all non-ammunition/alchemical weapons up to Duom.
Jungle Weapons: Ankus, atlatl, Throwing Axe, Blowgun, Greater Blowgun, Bola Flail, Bola, Barbed Bola, Yuan-Ti Serpent Bow, Chakram, claw bracer, Club, Tigerskull Club
Northern Weapons: Atlatl, Ice Axe, Bone Bow, Tigerskull Club (other Frostburn weapons)
Low-tech weapons: Atlatl, Blowgun, Greater Blowgun, Bola Flail, Bola, Barbed Bola, Boomerang, Talenta Boomerang, Xen'Drik Boomerang, Bone Bow, Club, Tigerskull Club
Pirate Weapons: Throwing Axe, Boot Blade, Chain, Chain Lash, Barbed Chain, Drow Scorpion Chain, Spiked Chain, Chain-and-Dagger, Club, Aquatic Crossbow, Cutlass, Dagger
Viking Weapons: Throwing Axe, Battleaxe, Club, Dagger
Medieval Weapons: Throwing Axe, Battleaxe, Caber, Club, Great Crossbow, (Repeating) Heavy Crossbow, (Repeating) Light Crossbow, Dagger, Punching Dagger
Underground/Mining weapons: Gnome Battle Pick
Hidden Weapons: Close Fighting Blade, Boot Blade, Bow Blade, Lute Bow, Monk's Cane, Weighted Cloak, Collapsing Crescent Fan, Dagger, Barbed Dagger
Eastern Weapons: Blowgun, Greater Blowgun, Monk's Cane, Chain (manriki-gusari), Chain Lash, Barbed Chain, Drow Scorpion Chain, Spiked Chain, Chain-and-Dagger, Chakram, chijiriki, claw bracer, Collapsing Crescent Fan
Unsorted: Hurl Club, Chuul Lasher, Chatkcha, Gnome Calculus, Dwarven Buckler-Axe, Elven Double Bow, Flutter Blade, Close-Fighting Blade, Battlehorn, Orc Double Axe, (Heavy) Aspergillum, Annulat, Alchemy Blade, Covered Crossbow, (Double) Hand Crossbow, Grapple-firing crossbow, Double Heavy Crossbow, Double Light Crossbow, Winch Crossbow, Cutting Wheel, Ribbon Dagger, Dragonsplit
I wanted to to a "Converted Tool" category, which would include things like sickles, clubs, tridents (converted pitchforks), and other 'plowshares to swords' type weapons, but I haven't found enough weapons in that theme so far to justify a table for it.
"Low Tech" weapons are from societies that either don't have easy access to iron, or haven't discovered steel smelting yet. There's a lot of overlap with Jungle, so you could probably combine those if you wanted to.