There are a lot of note-taking apps for iPad, including the free one that came with the device. But the Circus Ponies NoteBook app for iPad promises to let you take notes the way you would on paper. You can use multiple fonts and colors to highlight certain points. You can even use a “highlighter” to make certain notes stand out. You can add sketches or diagrams to your notes using the application’s pre-built collection of shapes and line types or just use your finger to draw. You can attach files to your notes, so class or meeting handouts stay with your own notes. You can make notes on top of PDFs of class handouts or lecture slides. You can even make an audio recording of the lecture that’s keyed to your notes; tapping on a note starts playback at that point. Finding your notes later is easy because of the notebook-like organization method. The Circus Ponies NoteBook for iPad requires iOS 3.2 or later, and it is $29.99 in the iTunes app store.