InstallerApp2ISO is an open-source utility designed to help you convert a macOS Installer application to a bootable ISO image. This software program can also generate a VirtualBox vdi disk image for booting a macOS VM using an APFS file system. Unfortunately, many users are daunted by the macOS Terminal command line. A GUI gives them more confidence in what they are doing.
Wineskin Winery creates Mac OS X ports/wrappers for Windows programs/games, with an easy-to-use GUI, integrated Wine, X11 and an installer.
LiquidMac uses a particle system to imitate liquid and responds to laptop orientation.
