Garry,
Thanks for your comment!
This is oour project road map:
In progress
Timer
Counter
Math instructions and Number variable
Comparators
Positive and Negative edges for Contacts
Latching and Unlatching Coils
Stage 3 - Next priority
Undo, redo
Saving ladder diagrams
Sharing diagrams
Drag and Drop for desktop browsers
Stage 4
Import/export logic in XML files
Projects with multiple diagrams