For a current list of the gears look at hedgewars/uTypes.pas at
the TGearType enumeration.
{{{
    TGearType = (gtBomb, gtHedgehog, gtShell, gtGrave, gtBee, gtShotgunShot, 
            gtPickHammer, gtRope, gtMine, gtCase, gtDEagleShot, gtDynamite, 
            gtClusterBomb, gtCluster, gtShover, gtFlame, gtFirePunch, gtATStartGame, 
            gtATSmoothWindCh, gtATFinishGame, gtParachute, gtAirAttack, gtAirBomb, 
            gtBlowTorch, gtGirder, gtTeleport, gtSwitcher, gtTarget, gtMortar, 
            gtWhip, gtKamikaze, gtCake, gtSeduction, gtWatermelon, gtMelonPiece, 
            gtHellishBomb, gtWaterUp, gtDrill, gtBallGun, gtBall, gtRCPlane, 
            gtSniperRifleShot, gtJetpack, gtMolotov, gtExplosives, gtBirdy, gtEgg, 
            gtPortal, gtPiano, gtGasBomb, gtSineGunShot, gtFlamethrower, gtSMine, 
            gtPoisonCloud, gtHammer, gtHammerHit, gtResurrector);
}}}
Note: gtBomb and gtShell were named gtAmmo_Bomb and gtAmmo_Grenade before 0.9.14
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