Live Notes is a colorful note-taking and sketching app that allows for simultaneous audio recording. Draw shapes and doodles during a lecture or meeting. Type text and choose from a variety of fonts and bright colors. Tap parts of a sketch to hear the audio that was recorded at the specific point in time when the sketch was drawn.
Live Notes is a paid app, but you can try Live Notes Lite for free.
Note Anytime is an app for taking notes, sketching, and annotating PDFs. Caligraphy tools support improved letter formation providing assistance with sloppy iPad penmanship. Use the app to easily import and markup PDFs. Export notes to popular social media sharing sites, like Twitter, Facebook and Drop Box.
Note Anytime is currently a free app available in iTunes.
ScratchWorksScratchWorks is a note-taking app that allows users to take notes on one side of the screen and browse the web on the other. Type text notes or insert a sketch area into the notes for doodling. It also provides a custom math keyboard.
ScratchWorks is a free app, available in iTunes.
Source: Cool Tools for 21st Century Learners