Mistletoe's Night by Ted Balmer
How
Mistletoe's Night was created using open-source software almost exclusively. All of the applications that were used to create this book can be freely downloaded by anyone (see below).
The illustrations were originally created using a 3D modeling application called Blender. Once they were final, the resulting 2D rendering was touched-up with the Gimp to adjust for lighting, color, shadows, etc. Once the individual illustrations were completed, they were laid out page-by-page in Scribus with the final draft of text.