1. Penultimate: Penultimate is an excellent iPad app which enables users to take notes, keep sketches and much more. It’s a must-have app for every designer which enables you to work from anywhere, anytime.
2. iDesign: iDesign is a very useful iPad app which enables users to draw 2D vector drawings and designs easily. With iDesign, you can Create vector graphic designs and illustrations, add shapes, insert text, and much more.
3. SketchBook Pro: Autodesk SketchBook® Pro for iPad is a professional-grade paint and drawing application. Using the same paint engine as its desktop counterpart, SketchBook Pro delivers a complete set of sketching & painting tools through a streamlined and intuitive user interface designed exclusively for the iPad experience.
4. Adobe Ideas: Adobe Ideas is an excellent app for iPad which enables users to complete all there sketching and drawing task easily. Adobe Ideas is an ideal companion for the professional design applications from Adobe, including Adobe Illustrator® and Adobe Photoshop® software.
5. iDraw: iDraw is the most feature-packed vector drawing and illustration app available on the iPad! With iDraw you can create multiple layers, add text and images, use multi-color gradients, brushes, Color Picker and much more.
6. SketchPad HD: With SketchPad HD, you can easily complete your drawing task and takes notes on you iPad. SketchPad includes a variety of paper types including yellow, graph paper and enable users to draw in a variety of colors, collect and browse through notes and share notes that you create on the iPad over email.
7. Brushes: Brushes is a popular painting app, specially designed for the iPad. Simple to learn, yet powerful enough for pros — Brushes has been used to create 4 different New Yorker covers!
8. iFontMaker: iFontMaker is an excellent iPad app which enables you to edit fonts and save them as TTF files. Later, these fonts can be used in all applications such as Adobe® CreativeSuite™, Microsoft® Office™ for Mac and Windows, and also in your web site as a web font.
