The latest version available is 1.10. This has been build for AmigaOS 4 only:

ignition 1.10, 5.2 MB

For AmigaOS 3, you'll only find the old 1.0 beta 1 version that has been released on August 20, 2006:

ignition 1.0 beta 1, 542 kB

You can find out how to check out the Mercurial repository and browse the repository online at SourceForge.