Dragon1 EA Modeling Language (EAML) is a set of 400+ entity classes or concepts, symbols, and rules for creating (in)formal Enterprise Architecture models.
ArchiMate® is an Open Group Standard, claimed to be an open and independent modeling language for enterprise architecture, supported by various tool vendors.
BPMN, or Business Process Modeling Notation, is a graphical representation for specifying business processes in a business process model, such as a swimlane diagram.
UML is an open modeling language, mainly for designing software applications and information systems. You can model in UML on Dragon1.