FEA – Federal Enterprise Architecture
A management practice for aligning resources to improve business performance and help agencies better execute their core missions.
More info: http://en.wikipedia.org/wiki/Federal_Enterprise_Architecture

TOGAF – The Open Group Architecture Framework
It provides a comprehensive approach to the design, planning, implementation, and governance of an enterprise information architecture.
More info: http://en.wikipedia.org/wiki/The_Open_Group_Architecture_Framework

Zachman Framework
It provides a formal and highly structured [...]

Design Principles at a glance. I will be adding more in coming days.

KISS

keep it simple and stupid
Keep it simple, stupid!
Keep it short and simple

The KISS principle states that simplicity should be a key goal in design, and that unnecessary complexity should be avoided

YAGNI
You ain’t gonna need it
It is the principle [...]