Movies

The movies of Dragonball and Dragonball Z at times do not fit within the actual anime or manga timeline except Bojack Unbound and the Warth of the Dragon. They show the introduction of Brolly, the "Legendary Super Saiyan" and his father, along with the introduction of Frieza's brother, Cooler. Of course, there is also the recent live action movie Dragonball Evolution which covers Piccolo Daimo events (modified greatly) and Chi-Chi know about Goku's ability to control his "ki" to close up lockers. They follow as below (in order and English titles mostly):

Dragonball -
Curse of the Blood Rubies,
Sleeping Princess in Devil's Castle,
Mystical Adventure,
The Path to Power (10th Anniversary Special)

Dragonball Z-
Dead Zone,
The World's Strongest,
The Tree of Might, Lord Slug,
Cooler's Revenge,
Return of Cooler,
Super Android 13!,
Broly: The Legendary Super Saiyan,
Bojack Unbound,
Broly: The Second Coming,
Bio-Broly,
Fusion Reborn,
Wrath of the Dragon,
Battle of Gods (Japanese title, unleased until March 2013)

Live Action-
Dragonball Evolution