Adobe Photoshop always was on of the best (if not the best) image manipulation tools out there. It all started in 1987, when Thomas Knoll decided to create a program for Mac computers.
If you don't want websites tracking you, and you don't want the pages you view to be saved in browse or search history, you need to active the incognito mode and this is what you need to do.
If you don't want others to use your photos and images without your permission, you can create a so called custom watermark with your name or any other text you want.
If you are a heavy twitter use, possibly with more then one account, than I suggest you to give Tweetdeck a try. You can arrange, schedule, monitor and manage your tweets with ease.