The Eye of Harmony is an artificially-created black hole used by the Time Lords as a power source for time travel.
Wormhole Refractor (see Fear Her)
A device the Doctor mentions as useful for crossing the universe
Untempered Schism (see Sound of Drums)
A gap in the fabric of reality, the Untempered Schism allows one to look directly into the Vortex
Tribophysical waveform macro-kinetic extrapolator (see Boomtown)
An interstellar transportation platform that utilises massive energy to create a force bubble that protects the rider while riding the shockwave to its destination; alternately, a "pan-dimensional surfboard”
Time Scoop (see Five Doctors)
Used by Timelords to pick up randomers to dump in the Death Zone
used by the Celestial Intervention Agency to control time over a small area, by exploring possible futures and select the one it likes.
Paradox Machine (see Last of the Timelords)
uses the power of the TARDIS to prevent the universe from collapsing under the inherent logical contradiction of the Toclafane killing their ancestors.
Hypersonic Sound Wave Manipulator (see Lazarus Experiment)
Reverses aging or vice versa.
Block Transfer Computation (see Logopolis)
Maths can be used to create stuff
Skasas Paradigm (see School Reunion)
Code locking off the building blocks of time, space and universal matter.