ISO Master is an application for creating and modifying ISO9660 files (ISO images).The first version was released as a working beta in August 2006 – with GTK+-based GUI widgets for the newly developed bkisofs (a library for reading and writing ISO9660 files in user space, including Joliet, RockRidge, and El Torito extensions).A Windows version of this product was previously available but is discontinued due to financial problems.