iAnnotate PDF is an excellent, full-featured app for marking-up or making notations on PDF files on your iPad. The app handles PDF files in such a way that you will feel as if you are working on your desktop or notebook computer. iAnnotate is well designed, provides a wide range of tools that can be arranged in a customizable manner, and is loaded with editing options.
The Sketch Pad program is a must for several reasons: it is very easy to use, has several features, and it is very nicely priced. All of the tools can be controlled from their home location at the bottom of the screen or be made to float and positioned anywhere they are convenient.
Idea Sketch, as the name implies, is a way to capture ideas and organize them in some hierarchical manner — such as in a concept map or flow chart. Idea Sketch is a no frills app, rather intuitive, and best of all it is free! There is an upgrade option for $3.99 but if all I am going to get are a few more shapes, colors, and fonts, I am not sure that I would opt for a paid version. The free version, which works on the iPhone and iPad, includes a check spell option when typing but the app does not include a way to spell check the entire work when completed.
