The basic versions of both are free. You can use WAMP for Win, and MAMP for Mac. Chrome DevTools. Chrome DevTools is one of those examples of best web design software that somehow doesn’t get enough credit most of the time. Probably because it’s included in Google Chrome by default, so people just take it for granted.
Pictaculous Official Page: http://www.pictaculous.com/ Initially, I wanted to include just one color tool on this list, but Pictaculous is just too awesome to ignore. Simply speaking, it’s another color scheme tool, but it works very differently than Adobe Color.