First was the BMExport module, which allows you to save your images out as bitmap images directly. Options include Sprite or GIF output, different DPI, scale or height and width setting, colour depth selection and dithering, and palette optimisation. This now means you can save your image - or just a part of the image - out without having to switch to a small 24bpp screenmode, taking a screenshot and then having to edit the image; you can get a nice large image, with transparencies if required, and even have it prepared for Web publishing straight off.
The second is the Grids module, which not only adds isometric grids to ArtWorks but also an unusual circular grid made up of concentric circles. As with the built-in grid system the display will adapt to the current zoom setting, so if there's too many dots to display a sensible grid it'll cut down the clutter automatically.
You can find out more information from Martin's website at http://www.mw-software.com/software/awmodules/awmodules.html.