If you're looking for manga similar to Death Note (Pilot), you might like these titles.
Takeshi wakes up one day to a cute shinigami, asking him to name his dying wish. Luckily for him, she's new at the job, and messes things up. Now, instead of being dead, he teams up with the shinigami Kiriko and helps grant the last wishes of people who are dying.
Ichigo Kurosaki has always been able to see and interact with ghosts, but one day after witnessing a fight between a shinigami called Rukia and an evil spirit known as a Hollow, he finds himself dragged into a completely new life. When Rukia’s body shrinks after the battle, she is unable to carry out her soul reaper duties and forces Ichigo to become a substitute shinigami for seven days while she recuperates. Now he spends his days freeing souls from their bodies and defeating evil spirits, but when one of his classmates dies and is kidnapped by a hollow, Ichigo must race to save her and ferry her safely to the next world…
Follows the adventures of a scientist Haiji and his assistant Chitose. One day the doctor is called to resolve a mystery about a glowing corpse. From the will of an unknown power the corpse then transforms into a monster and Haiji has to defeat it, to learn all about a mysterious black apple which can regenerate itself and which when eaten will enable someone to control gravity...