AppleWin is an Apple II emulator for Windows. It emulates Apple II system with 128 KB RAM, two 5.25″ floppy drives, joystick, and serial card. It also supports both 40 column and 80 column text modes.
AppleWin supports ProDOS and Apple DOS 3.3 disk image formats, as well as hard disk images. Supported file formats include .BIN, .DO, .DSK, .NIB and .PO files.
You can get AppleWin from GitHub.