Just saw this, looks quite impressive.
http://www.plctalk.net/qanda/showthread.php?t=42656
https://sourceforge.net/projects/advancedhmi/

Quote:
dvancedHMI is an HMI development package based on Visual Basic
Express 2008 (also free). Although it is based on Visual Basic, it
contains a group of controls that allow you to build an HMI without
the need to write any code. Even those that have never written a single
line of Basic can use it to develop an HMI. It includes a driver for
Allen Bradley SLC/Micrologix over RS232, but will also work over
DH485 and DH+ with appropriate hardware (KF2,KF3, DL3500, UIC).
Also includes a very basic driver for Beckhoff TwinCAT (very early in
development). All source code is included, making it very easy for
more advanced VB programmers to expand the object library.

Xiaofan
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