The man behind AmigaWorld.de is Matthias Münch. He has designed and produced a vast amount of adapters, expanders, modules of all kinds for various Amiga models.
A501 + RAM expansion
A572 RAM expansion
Amiga 500 CPU Relocator
Amiga 500 Denise Relocator
Amiga 500 KickROM Switch
Amiga 600 68000 PLCC DIP adapter
Amiga 600 Gayle adapter
Amiga 600 KickROM Switch
Amiga 1000 CPU Relocator
Amiga 1000 Kickstart ROM adapter
Amiga 600/1200 S-Video adapter
Amiga 600/1200 / CD32 CXA2075 adapter
Amiga 600/1200 CF-IDE adapter
Amiga 600/1200 IDE adapter
Amiga 1200 Gayle adapter
Amiga 1200/4000 Alice adapter
Amiga 1200 clockport riser
Amiga 1200 clockport adapter
Clockport expander
Clockport Expander II
Amiga 1200 mouse port
Amiga 1200 expansion module
Amiga 1200 RTC modules
Amiga 1200 Z4 video slot adapter
Blizzard 1220 ADD4M
Amiga 2000 CPU adapter
Amiga 3000 SIMM ZIP Ram Adapter
Amiga 3000 Tower SIMM ZIP Ram Adapter
Amiga 4000 IDE terminator
Amiga 4000 Tower Ports Module
Amiga 4000 Tower Disk Module
Amiga DF0 Terminator
Commodore SCSI II terminator board
Flash ROM adapter
Lithium battery module
PLCC DIP adapter (for Denise, Paula and 68000)
SOJ26-20 DIP20 adapter