I created this for all SysMo Modellers
http://www.semanticsbml.org/aym Annotate Your Model
There you can annotate your non SBML models with biological terms (MIRIAM annotations). As a cool extra you can view you model source code with inserted biological infomation.
Together with this http://www.semanticsbml.org/semanticSBML
you can serach for similar BioModels. The similarity search is based on MIRIAM annotations that are attached to you model. AYM also allows you to create annotations without