For a current list of the gears look at hedgewars/uTypes.pas at

the TGearType enumeration.

{{{

    TGearType = (gtATFinishGame, gtATSmoothWindCh, gtATStartGame, gtAirAttack, 

            gtAirBomb, gtBall, gtBallGun, gtBee, gtBirdy, gtBlowTorch, gtBomb, 

            gtCake, gtCase, gtCluster, gtClusterBomb, gtDEagleShot, gtDrill, 

            gtDynamite, gtEgg, gtExplosives, gtFirePunch, gtFlame, gtFlamethrower, 

            gtGasBomb, gtGirder, gtGrave, gtHammer, gtHammerHit, gtHedgehog, 

            gtHellishBomb, gtJetpack, gtKamikaze, gtMelonPiece, gtMine, gtMolotov, 

            gtMortar, gtParachute, gtPiano, gtPickHammer, gtPoisonCloud, gtPortal, 

            gtRCPlane, gtResurrector, gtRope, gtSMine, gtSeduction, gtShell, 

            gtShotgunShot, gtShover, gtSineGunShot, gtSniperRifleShot, gtSwitcher, 

            gtTarget, gtTeleport, gtWaterUp, gtWatermelon, gtWhip, );

}}}

Note: gtBomb and gtShell were named gtAmmo_Bomb and gtAmmo_Grenade before 0.9.14