Kumaji is an advanced subtitle rendering library aiming for complete cross-platform support, complete and compliant support for all common subtitle formats and, of course, speed. The source code is also intended to be easy to understand and hack at.
It is needed for windows too! All current implementations of subtitle renderers are not ideal. Something looks good with vsfilter, with ffdshow it can looks a bit different. libass is not really awailable for windows ant even if so - its output will be different from both... Since none of these renderers are in development, we need at least this new one! I understand that aegisub is a nice thing but it already pretty mature software. So please spend more time on this project.
Very needed for Mac and linux.