Our flagship multi-purpose Joomla module has it's own mini site where you can also find information on implementing it's various layouts.
Zenkit also has it's own mini site which not only holds the demos for our standalone K2 Joomla templates but also information on using them.
For all Joomla 3+ templates built using the Zen Grid Framework v4 (any theme after October 2014) please refer to the Zen Grid Framework v4 documentation.