iCab is a configurable web browser for the Macintosh by Alexaner Clauss. On 1st January 2008, stable versions 3.0.5 and 4.0.0 were released. iCab 4 is rewritten in Cocoa, uses WebKit for its rendering engine, and requires Mac OS 10.3.9. iCab 3.0.5 is suitable for users of older versions of Mac OS, requiring only Mac OS 8.5. iCab 2.9.9 is still available for users of 68k Macs.