FS-UAE is an Amiga emulator based on the excellent emulation code from WinUAE. FS-UAE emulates A500, A500+, A600, A1200, A1000, A3000 and A4000 models, but you can tweak the hardware configuration and create customized Amigas.
FS-UAE Launcher has special support for running individually zipped WHDLoad Games. It will even store save-games in the state directory.
The recommended download file contains both FS-UAE Launcher and FS-UAE Arcade.