Another Great LISP , AD (Automatic Dimension Autocad) is designed to automate the task of dimensions multiple lines, Polylines and polylines with arcs (the real Arc length)

Execute the Command by typing AD And choose your objects. Users have the OPTION (Dialog Box)  to choose where you want your dimension to be. “Local Linear Dimension” Position can be located above or below line. “Arc Dimension Position” have similar location options.

The command work well for any Text Style, including Annotative Styles.

Download Link: AD-Automatic Dimension Autocad

Automatic Dimension Autocad Demo

Automatic Dimension in Action