Collage = irfanview or Ms.paint
Pen input(bamboo) = mypaint (open source)
Attempted math art via (previously pop dA subcategory) winamp avs vis.
Hacked 2 joysticks and made a digital etch-sketch style interface.
Collage play is for learning... joining skatepark photos together then planning the practical navigation path through it.. ..& languages other than english by attaching text labels to ordinary landscapes/interiors&counting objects in the scene
Before the n900 (nokia phone with pen & mypaint) I did much years pen doodles, going with the digital pen has let me (a total hack/v.ordinary talent/skills) attempt techniques that I would have previously had to set aside a desk/easel/... and buying real paint just 4 a unsure result has always been the reason why I never attempted to get my fingers dirty... digital brushes relieve some of the intimidation of wasting paint in the beginner stage.
N btw happy birthday 2