My first Drupal module is complete! The Asymptote Filter is in it's dev stage, but it's perfectly usable for Drupal 5. It read everything between the <asy> tags and use Asymptote to convert it into eps and then ghostscript convert it into png. Don't use it on production server, the most important of the module, the security filter, does not exist.
I wrote it so I don't have to write a extension for DruTex. DruTex is powerful, and the trade off the the complexity of the code. To port DruTex to Drupal 6 or create new features are really difficult task. So I chose to write my own(both Drupal 5 and 6 version), and scatter them into single modules(for now, Asymptote only) so people can activate or remove. In the future, I will also create plugin for FlexiFilter, but for performance sake, a hard coded module is faster than a module interpreted by FlexiFilter.
I still recommend DruTex, some of the features I will never intend to create for my filters. LaTeX2HTML, HTML2LaTeX and remotely render LaTeX does not fit my need.
Download and try it out :)