Basilisk II is an Open Source 68k Macintosh emulator. That is, it allows you to run 68k MacOS software on your computer, even if you are using a different operating system. However, you still need a copy of MacOS and a Macintosh ROM image to use Basilisk II. Basilisk II is distributed under the terms of the GNU General Public License (GPL).
For more information, see the README file. If you are interested in learning how Basilisk II works internally, there is a Technical Manual available (knowledge about programming and computer architecture is required).
For announcements of prebuilt binaries for Linux, Mac OS X, and Windows, head over to the E-Maculation Forums.
Other prepackaged versions of Basilisk II that I am aware of:
Really old versions for legacy systems:
To download the current version of the repository via Git:
$ git clone https://github.com/cebix/macemu.git
After downloading and setting up the repository you can, for example, try to compile the Unix version of Basilisk II:
$ cd macemu/BasiliskII/src/Unix $ ./autogen.sh $ make