Photon rifle-- Projectile weapon firing 8mm projectile containing one gram of matter and one gram of antimatter, rather like a tiny photon torpedo. Personal forcefield-- They already have it, they need to start USING it. Ranging from belt-mounted generator to vest-style for redshirts. Portable tractor beam-- Wesley invented it, Starfleet should start using it. Handy for away missions and other bad situations where you really need to lift a girder off somebody and don't have an android handy. Personal cloaking device-- Sure, Starfleet can use them for peaceful purposes. But the freaking Jem'hadar never signed the treaty of algernon, so we'd better start using them more often. . Hunter seeker-- A photon grenade equipped with a tricorder and a thruster pack. Automatically seeks out a specific target somewhere on the planet; basically, a hand-held fire and forget cruise missile. Non-lethal version can be used as a UAV for recon, surveilance, search and rescue, and emergency communications. Portable microwave-- Because when the power goes out, you shouldn't have to heat up your coffee with a freaking hand phaser!