Adobe Ideas

Adobe Ideas is a digital vector-based sketchbook for drawing and capturing design ideas – which you can then send for further working on to Photoshop and Illustrator.

Doodle Buddy

Doodle Buddy is a doodling app which can let you quickly sketch out design ideas and anything else with your fingers. Colors included.

ZeptoPad Vector Based Drawing

ZeptoPad is a note & whiteboard application with which you can draw vector images. You can do such as rectangles, circles, arrows, and connectors.

ColorExpert

ColorExpert makes it easy to grab, identify, capture and showcase your chosen colors. Color Expert “snap & tap” technology. Just snap a photo and let your finger select that perfect color. From your eyes to the screen. you can simply click the ColorExpert button on your iPhone and find out the shade, color scheme, and palette you would like to match.

Palettes

You can easily choose sample colors from web pages, Photo Albums in your iPhone. You can also import and export palettes to Photoshop. Now you can create a color palette anywhere at anytime. Great for creating color schemes. Grab colors from a photograph, a website, or add colors using any one of 5 color models. Quickly find matching colors with support for many different color schemes.

FontShuffle

FontShuffle is great tool for designers that allow you to find right fonts for your projects. You can browse amazing typography fonts from original designer’s works.

Adobe Photoshop Express

Adobe Photoshop Express is another useful app for designers. It lets you use simple gestures to quickly edit and share photos from iPhone and iPad. You can save your time editing quickly.