With the direct inclusion of the WHDLoad booter within the emulator, all available files are now included within Amiberry's distribution.
This site does not host game-data files or Amiga Kickstart (BIOS) files.
There are many web-sites which already provide WHDLoad Amiga game data already "pre-installed", and Amiberry's WHDLoad booted has been designed to be compatible with the 'Retroplay' WHDLoad packs.
Amiberry Amiga Emulator: Amiberry 3.3
Please note: Amiberry can now be installed directly from the RetroPie setup menu.
Amiberry developers, including the lead; Midwan, are also active on the Facebook support group.
For an excellent Amiga-friendly artwork scraper: Lars Muldjord's SkyScraper should cover your needs. Lars is also an active member of the Facebook support group.