What's your favourite Freeware, OpenSource Progz?

http://www.expresii.com/ is in public beta.
Very high res ink calligraphy solution for eastern style ink painting and calligraphy.
Unfortunately it doesn't work with my monitor Cintiq constellation.

EDIT:
Attention! Don't use the update button.
Access violation windows are popping up - hundreds. You have to stop the x.exe process with task manager.
Couldn't get it running even with my intuos.
Only mouse

Snapshot export is up to 12.288*8,192. One have to get used to it, but interesting - if it would work for me

http://nathanfriend.io/inspirograph/

paint some spiro-line-patterns with different gear-sizes a lot of people like that, maybe you too? for my self, I did play that only for 5 minutes and now I return too verve

if some one is coder - this a the code of that drawing tool: https://github.com/nfriend/inspirograph

yes i have this one! 1965-1970

Sketchup 2016 released!
http://www.sketchup.com/
Version free Make is working!

Quickgamma + PTGammaTutorial - monitor-calibration - freeware,

maybe not so perfect like expensive hardware tools, but if you have good eyes and you will get maybe happy with that.

Youtube-Tutorial: https://www.youtube.com/watch?v=oBYbvVEVMbc
Take a look also here: ttp://www.phototopics.net/pt_gamma/
Freewaredownload: http://www.quickgamma.de/ works for Windows 7 and upward

ps.
I have also a computer-room with 2 coldlight led bulbs - from tiwin 5700k and my Monitor is a Eizo EcoView EV233W - not a highend, but a cheap one from Eizo

For Sketchup 2016 Make (free)(Visualizer (free) yet installed on SU 2015)
Installation don't work directly !
(I suppose that is working directly if Visualizer don't yet installed!)

A little trick! (For Windows 8.1 - I don't know Mac's world! )
Make this new folder Plugins (don't existing because 2016 is new and empty)
and copy past from the ProgramData / SU 2015:
Folder ImaginationVisualizer and file ImaginationVisualizer.rb
That's all!

You must have that!

Viz2016.jpg (35.06 KiB) Viewed 10288 times

Works like a charm! And works in duplication 2015 2016 !

viz2.jpg (29.96 KiB) Viewed 10288 times

Hello pilou, how did you render your sketchup-projects? I'm stunning about LumenRT, but it's expensive

I'm also sorry about quickgamma - it's maybe not so fine? hould I buy a spyder pro e.g.?

@Zeropainter
LumentRT VIZ 2015 for SKetchup is free!!!
http://www.lumenrt.com/store/

You have just this little watermak + line so just make a big view and trim it!

04_Desert_001.jpg (45.57 KiB) Viewed 10268 times

pharo.jpg (19.16 KiB) Viewed 10268 times

Else if you want free one for Sketchup without WaterMark: Twillight Hobby

Or if you want astonished and free : Unity 5 or UE4 or more simple Fibix Studio or Revizto!

Ps My favorite but not free LightUp because it's simple and true real time inside SU without flickering!
Sure a little pre-caculate time but after what a confort of movement!

I tried different lowbudget pp (im not professional) for my macbook. some of them are hard to use to do simple things... now im using this photo editor for mac http://macphun.com and it does the job for me. it also have user-friendly interface

I tried different lowbudget pp (im not professional) for my macbook. some of them are hard to use to do simple things... now im using this photo editor for mac http://macphun.com and it does the job for me. it also have user-friendly interface

Im searching interesting stuff like a macphun and i can say there some editors like this one wich are better even for a gimp