A collection for iPads, PCs, tablets–all mixed up for now:
- Adobe Reader–works, might be quirky, pretty much on all computers (free)
- Annotation Studio
- Evernote–PC/Mac/iPad (free and fee)–markup using Skitch
- FoxIt–add notes, draw,
- iAnnotate–iPad app (fee)
- Nitro Reader-—highlight, sticky notes, type text anywhere, collaborate
- Notability–imports file and allows full editing (fee)
- OneNote–like Evernote, part of the MS Office Suite (free under many circumstances)
- PDF Exchange Editor (free or fee)–comment, annotate, markup with text or drawing
- Preview (for Macs)–read and annotate pdfs