I love to paint - furniture, walls, fabric. And I love to do it by myself. But sometimes I have not enough courage to try some wild paint or unusual color, particularly if this is costly - time or material. Sometimes I am pretty sure my hubby would complain. I tried some tools earlier, mostly for photo editing to simulate various colors, but this was too tiresome. Recently I discovered there are tools particularly developed for this purpose. Some big paint manufacturers offer their own software, and there are some more to be found on the net. Some tools are very simple - there are photos embeded and you are able just to chnage different colors. Others allow you to upload your own photo and then play colloring objects on the photo. Bellow are some free tools I tried. It is now much easier for me to make decisions.
Colorjive is an on-line tool. You can upload your own photo, choose the color and (re)paint object on it. But nothing is perfect, of course, and some adjustment you need to do by hand. There is an excellent 3 minute Youtube video tutorial for this tool.
Resene EzyPaint is a free software you could download on the PC (ful version with all images takes 400 MB, but the customized one is just about 100 MB.) There is on-line version as well adn help is very easy to follow and very usefull. Y>ou can upload your owen photo as well.
Some manufacturers like Dulux and Sherwin Williams offer their own tool. Dulux offers just a basic, simple possibilities - to chane colors on their photos, but it could be usefull (and fast to try).