Android Blueprints - Bulma found these when searching the basement of Dr. Gero. In doing so she found out a way to destroy the androids and created a device but Krillin crushed it because he fell in love with Android #18. Also these blueprints helped Dr. Briefs repair Android #16 aswell as taking out the nuclear bomb within him. In doing so, Android #16 did not know of this and jumped on Cell in the Cell Games thinking he was going to use the nuclear bomb within him to destroy Cell but they told him it was gone when it was too late and Cell had disposed of Android #16.
Cell's Egg Shell - This was found at the sametime Bulma, Gohan and Trunks found the old time machine Trunks came to the past with. The Shell was in the time machine with the glass broken everywhere. Cell went to his larvae state after hatching from his shell. Very soon afterwards they found the shell or the remains of the larvae form of Cell which meant he was already in his imperfect form. After all these discoveries these three made at this point of time Bulma had decided to take cell's egg shell to her lab for close observations.
ChiChi's Helmet - In DragonBall, ChiChi wore this crafted helmet. Most likely crafted by her father, the Ox-King. Since he crafted most of her clothes in the first place. When ChiChi got frightened, the helmet would shot a powerful blast. She did not wear this helmet very long. Unfortunately she stopped wearing it when she started to learn self-defense.
DragonBall Radar - The DragonBall Radar is one of the many great inventions of Bulma. What the DragonBall Radar does is it detects the nearest or exact location of a dragonball. Infact this was introduced in the beginning of the series DragonBall. It's how Bulma and Goku meet, shes seaching for a DragonBall and Goku attacks her vehicle because he thinks it is a monster. The DragonBall Radar is used all throughout all three series of DragonBall.
Janemba's Sword - This weapon only made one appearance and one appearance only. In DragonBall Z Movie # 12, Janemba shocks us all when he pulls out his sword. This sword may be the most unique sword throughout the entire DragonBall Trilogy. This sword is a sparkling, jet red color with a silver trim. Janemba uses this sword during his time in his second form. He fight's greatly with this sword but is destoryed by Son Gokou sooner or later.
Namek Spaceship - You only get to see one of these objects throughtout the only series. The one shown was used to transport alittle Namek to planet earth where later becomes Kami and Piccolo. This has to be one of the most unique ships out of all the ships in the series. When the Z Fighters must fly to planet namek Mr. Popo shows Bulma, Gohan, and Krillin this ship. The three use it to go to planet namek, the ship is very fast and is great in battle.
Scouter - The Scouter was a device to detect normal and hidden powerlevels. The item first appears in the Saiyan Saga of DragonBall Z when Raditz arrives on Planet Earth. Other characters use this item such as Bardock, Frieza, Nappa, Vegeta, Turles, Zarbon, Dodria, Captain Ginyu, Recoome, Guldo, Jeice, Burter, General Rildo, and King Vegeta.
Senzu Bean - The Senzu Bean was a magical bean that you would eat and within seconds you would be restored back to full health and power. This item first aired in DragonBall Z. It was used acturally quite often, almost in every single saga. It really wasen't used in DragonBall Grand Tour. Korin made the beans, it really doesn't tell how or any ingredients. Yajirobe usually made the deliveries.
Tapion's Sword - This sword was wielded by the hands of Tapion. This sword is legendar being almost exactly identical to the legendary sword his older brother wielded, the Minosha Sword. The only different in this one sword, is the decorations. Tapion pasted his sword down to Trunks. We see this in the Trunks Saga and so on. In DragonBall Z Movie # 13, it shows Tapion giving Trunks this sword. But it really doesn't explain why. Trunks is very skilled with this sword.
Zed Sword - The Zed Sword was first appeared in the Buu Saga. In the Buu Saga, Shen takes Gohan to his home planet to extend his powers thinking that Gohan was their only hope against Buu. In Gohan's normal state, it was very heavy and hard for him to swing and/or master. Gohan could easily do it in his Super Saiya-jin form. But he would gain more strength by mastering it t his normal state. Gohan finally gets the hang of it when his father arrives, Son Gokou. They test it out by having Gohan slice threw bolders that Son Gokou throws at him. Than Shen makes a huge cube of the toughest steel in the universe. Son Gokou throws it at Gohan, Gohan makes it half way through the material before the Zed Sword breaks in half. This is where Eldest Kaioshin appears from the Zed Sword.