This QGis plugin draws basic geometry shapes with user defined measurements and also allows free drawing.

Features/usage:

• Integrates in the digitizing toolbar.
• Options are rectangles, squares, ovals, and circles.
• Use shift to fix the aspect ratio and create perfect squares and circles ...
• or otherwise freely draw and later enter exact dimensions.

Currently the dimensions are dictated by the default map units of the project CRS which can be degrees. This will change to QGIS measurement units in a forthcoming release.

• 0.7 Handle layer CRS that is different from the project CRS. Also don't prompt for non existing attributes.
• 0.6 Add Undo and make behave like the default polygon tool (fix issue 1 and a minor bug)
• 0.5 Make QGis3 compatible
• 0.4 Added ovals Use Shift-key to switch between squares/rectangles and circles/ovals Tips and feedback through gui Lots of minor improvements
• 0.3 Add basic support for circles
• 0.2 Allow for geometries with fields