Hi Jimmy any relatively serious application (Xara and Drawplus included) will have an option of placing and snapping to a grid.

Drawplus has a tab called a 'gallery' in which you can drag and drop anything from a drawplus document. Once the image is in the gallery you can drag and drop it from the gallery into any other document, but unfortunately you can't (at least I don't think you can) import files from your computer wholesale into the gallery without putting them into a drawplus document first - you'd have to insert them as images into the document (if that makes sense).