Doctor Who was originally on-air between November 23rd 1963 and December 6th 1989, which makes 26 years for those of us who aren't maths whizzes.
A television movie was co-produced with Fox and Universal in 1996.
A range of novels covering continuing stories - the "New Adventures" was published by Virgin between 1991 (starting with
Timewyrm: Genesis) and 1997 (last book published was
So Vile A Sin, but, IIRC, the last in-sequence was
The Dying Days).
A range of BBC tie-in novels covering continuing stories for the Eighth Doctor of the TV Movie, Paul McGann, was produced between 1997 (
The Eight Doctors by Terrance Dicks) and 2005 (
The Gallifrey Chronicles, by Lance Parkin).
Both book series were paired by a run of books chronicling stories for previous Doctors, often slotted in-between their on-screen serials. The New Adventures were paired with the Missing Adventures, and the Eighth Doctor Adventures with the Past Doctor Adventures.
Big Finish Productions have been producing past- and Eighth Doctor audio plays since
The Sirens of Time which came out in about 1999.
There were also two stand alone Dalek films in the 1960s starring Peter Cushing as the human scientist, "Doctor Who". There was also a 1979 (?) TV spin-off pilot for a series called
K9 and Company.
Oh, and Telos Publishing, which was set up in 2001, have published some DW novellas; I think the only other spin-off matter worth mentioning from before the revival is
BBV.
So uh, does that answer your question?