Verilog-mode.el is a Verilog mode for Emacs which provides context-sensitive highlighting, auto indenting, and provides macro expansion capabilities to greatly reduce Verilog coding time. Recent versions allow you to insert AUTOS in non-AUTO designs, so IP interconnect can be easily modified. You can also expand Verilog-2001 ".*" instantiations, to see what ports will be connected by simulators. WWW: http://www.veripool.org/wiki/verilog-mode