Trébol V1A cube with four dents on every side.
TriCubeA sticker variation of a Dayan Guhong (where the pieces itself are colored) which results in a puzzle with three solutions.
Trihook CubeFour hooks intertwined in a very complex pattern.
Troll CubeA sticker variant that works like a Super 3x3x3 and is always solvable after arbitrary reassembling.
Tsukuda Rubik's Cube IIA later edition of Rubik's Cube. Sold by Japanese company Tsukuda Original under license of Seven Towns.
Tunnel CubeThe Handlebar Cube implemented differently. It allows more moves than the predecessor.
Turbull TartanA custom made sticker variation inspired by the tartan cube.
Two-Faced CubeA 3x3x3 with stickers covered with lenticular lenses. Whether it looks solved depends on the view angle.