Barrier: This purely defensive technique forms a Ki-shield around the body that protects the user from Ki or similar attacks. There are two forms of this maneuver. One is a spherical shield that surrounds the body, the other is more of a coating of the body.
Who can use: Freezer, Artificial Human #17, Cell, Vegita
Big Bang Attack: One of the first techniques Vegita developed as Super Saiyajin, the Big Bang attack is a huge ki bolt of incredible destructive power. Vegita holds one flat palm forward towards his enemy and launches the bolt. The attack that took out Artificial Human #19.
Who can use: Vegita
Burning Attack: Future Trunks' trademark ki attack, this is a powerful energy blast shot from both hands. Trunks holds both hands forward, does some strange arm moves, and then puts both hands forward again, index fingers and thumbs touching. Then he releases the blast.
Who can use: (Future) Trunks
Death Ball: This is a small ball of energy which Freezer can create from either the tip of his finger or with both hands. While small, it is very powerful, and can even destroy planets.
Who can use: Freezer
Eye Beam: Not a particularly interesting technique, but was used enough during the DB/DBZ series that it deserves to be put here. It is basically a double ki blast shot from the eyes. While the blast itself is small, it explodes on impact to do a fair amount of damage, and can also be used to stop other ki blasts.
Who can use: Piccolo, Freezer, Artificial Human #20.
Galick-Ho: The Galick-Ho is Vegita's answer to the Kamehameha. He powers up the blast like the Kamehameha, but when he releases the blast, his hands are both palm-forward.
Who can use: Vegita
Hell's Flash: In order to fire a blast with the most power, Artificial Human #16 takes off his hands, tucks them under his arms, and fires a powerful blast from the cannons under his wrists.
Who can use: Artifical Human #16
"Invisible" Jumping*: First used against Kulilin in the second Tenkaichi-Budokai, Goku uses this attack to become "invisible." He jumps back and forth so fast that you cannot see him, then he stops jumping for a surprise attack.
Who can use: Son Goku, and probably Kulilin, since Goku said he would teach him.
Kamehameha: Quite possibly the most commonly used special technique in all of the DB/DBZ series, the Kamehameha is a technique created by Mutenroshi. It is a ki blast, which to start is charged up held behind the firer in cupped hands, then brought forward to release a large blast of energy. Goku later develops to ability to control the direction of the blast, shoot one from his feet, or with a single hand. Also, he later develops a Cho-Kamehameha with even more power than the standard fare. Goten can use it as well, but misprounounces it as "Kamekameha" when he uses it
Who can use: Mutenroshi, Son Goku, (Old) Son Gohan, Yamucha, Kulilin, Tenshinhan, (Young) Son Gohan, Cell, Cell Junior, Son Goten, Majin-Buu.
Destrocto disk: This is another attack that is used quite frequently during the second series. It is a flat, disc-shaped Ki blast, which can be used to slice through its target with deadly accuracy. The destrocto disk can also be controlled by the firer.
Who can use: Kulilin, Vegita, Freezer, Cell, Artificial Human #18.