DEB theory has been extended into many directions, such as 
*effects of changes in shape during growth (e.g. V1-morphs and V0-morphs)
*non-standard embryo->juvenile->adult transitions, for example in holometabolic insects 
*inclusion of more types of food (substrate), which requires synthesizing units to model 
*inclusion of more reserves (which is necessary for organisms that do not feed on other organisms) and more structures (which is necessary to deal with plants), or a simplified version of the model (DEBkiss) applicable in ecotoxicology  
*the formation and excretion of metabolic products (which is a basis for syntrophic relationships, and useful in biotechnology)
*the production of free radicals (linked to size and nutritional status) and their effect on survival (aging)
*the growth of body parts (including tumours)
*effects of chemical compounds (toxicants) on parameter values and the hazard rate (which is useful to establish no effect concentrations for environmental risk assessment): the DEBtox method
*processes of adaptation (gene expression) to the availability of substrates (important in biodegradation)
A list and description of most common typified models can be found [http://www.debtheory.org/wiki/index.php?title=Typified_models here] .