Gimp
GIMP is a free and open-source raster graphics editor used for image manipulation and image editing, free-form drawing, transcoding between different image file formats, and more specialized tasks.
Exercise 1
Link to Gimp Tutorial
InkScape
Inkscape is a free and open-source vector graphics editor used to create vector images, primarily in Scalable Vector Graphics format.
Exercise 2
Link to Inkscape Tutorial
Fusion360
Fusion 360 is a cloud-based CAD/CAM tool for collaborative product development. Fusion 360 enables exploration and iteration on product ideas and collaboration within distributed product development team. Fusion 360 combines organic shapes modelling, mechanical design and manufacturing in one comprehensive package.
Drawing Exercises
Exercise 1
Fusion 360 exercise 1 drawing File
Exercise 2
Fusion 360 exercise 2 drawing File