Esrael
From Sonic Retro
<forumuser name="Esrael" /> One of the best hackers that this scene has ever seen. He is best known for his Delta series of hacks in Sonic 2 and Sonic 3, his discovery of lost Sonic the Hedgehog 2 (Simon Wai prototype) sprites and his Esrael Sonic Editor.
External Links
Esrael Sonic Hacking H.P. -- Esrael's Sonic hacking site (Brazilian Portuguese), which features hacking notes, tools, and his Delta series of hacks.