Orbiter scripting engine.
Allows event handling (missions, storylines) in Orbiter.
Uses pascal scripts (paserscript).
Major information source: Main Orbiter forum thread
Update beta 2:
Fixed script format to be readable by Notepad program
Fixed many typos in reference-manual.
Expanded some of the manual articles.
Added missing VK_0...VK_9, VK_A...VK_Z keycodes.
v 0.3-0.5
The script compiler/interpreter was rewritten and now more powerful than it was before.
Many new control/information functions.
Global scripts support and streamlining of scripting system.
Deeper integration into Orbiter - easying of use for non-coders by using graphic config system.
Screen and console MFD with drawing-from script support
Sound playback support.
Save state support.
Topical event handlers support.
Global keyboard support (aka intermod)
Manual improvements
And lots of bugfixes.