I've just added a number of Sega Genesis and PC-Engine games that have been pre-patched with translation patches. The Sega Genesis titles that are now available in English are:

Advanced Busterhawk Gleylancer (Japan) [En by MIJET v20061023]
Advanced Daisenryaku - Deutsch Dengeki Sakusen (Japan) (Rev A) [En by Nebelwurfer v0.95] (~Advanced Military Commander) (Incomplete)
Bare Knuckle III (Japan) [En by Twilight v1.0]
Battle Mania Daiginjou (Japan, Korea) [En by MIJET v20061029] (~Trouble Shooter Vintage)
Battle Mania Daiginjou (Japan, Korea) [En by MIJET v20061029]
Dragon Ball Z - L'Appel du Destin (France) [En by DBZGame v0.95a] (Incomplete)
Dynamite Headdy (Japan) [En by MIJET v20070428]
Langrisser II (Japan) (v1.2) [En by MIJET v20081106]
Monster World IV (Japan) [En by DeJap+Demiforce+Shion v2.2]
Monster World IV (Japan) [En by DeJap+Demiforce v1.02]
Phantasy Star II - Anne's Adventure (Japan) (SegaNet) [En by MIJET v20071024]
Phantasy Star II - Huey's Adventure (Japan) (SegaNet) [En by MIJET v20081106]
Phantasy Star II - Kinds's Adventure (Japan) (SegaNet) [En by MIJET v20081213]
Phantasy Star II - Shilka's Adventure (Japan) (SegaNet) [En by MIJET v20080628]
Phantasy Star II (USA, Europe) [En by Naflign v1.0]
Phantasy Star II (USA, Europe) (Rev A) [En by Naflign v1.0]
Pulseman (Japan) [En by MIJET v20070226]
Sonic Eraser (Japan) (SegaNet) [En by D v1.0]
Sorcerian (Japan) [En by Hungdongs v0.50] (Incomplete)
Tougiou King Colossus (Japan) [En by MIJET v20061030] (Family Friendly Edition)
Tougiou King Colossus (Japan) [En by MIJET v20061030]
Twinkle Tale (Japan) [En by MIJET v20070328]
Undead Line (Japan) [En by MIJET v20070903]
Warsong (USA) [Text Hack by D v20010219] [Graphic Hack by MIJET v20070103] (~Langrisser)
Yuu Yuu Hakusho - Makyou Toitsusen (Japan) [En by MIJET v20071113]
Zero Wing (Europe) [Text Hack by Vincent404 v20010422] (Translation Fix)

These are almost all the translations available for Sega Genesis titles. Also, for PC-Engine (Turbografx 16) the following titles have been added:

Aoi Blink (Japan) [En by Gaijin+Zatos v0.99b]
Bikkuriman World (Japan) [En by Demiforce v1.0]
Bubblegum Crash! - Knight Sabers 2034 (Japan) [En by Dave Shadoff+Filler+Tomaitheous v1.0]
Druaga no Tou (Japan) [En by Procyon Lotor v1.1] (~Tower of Druaga, The)
Gaia no Monshou (Japan) [En by D v1.0] (~Crest of Gaia, The)
Gekisha Boy (Japan) [En by Zatos v0.99] (~Photograph Boy)
Lode Runner - Lost Labyrinth (Japan) [En by Dave Shadoff v0.99]
Maison Ikkoku (Japan) [En by Dave Shadoff+Filler v1.01]
Puzzle Boy (Japan) [En by KingMike v1.0]
Shanghai (Japan) [En by Dave Shadoff v0.99]
Son Son II (Japan) [En by Sgt. Bow v1.0b]

You can find them in our Sega Genesis ROMs Section and PC-Engine / Turbografx 16 ROMs Section.