PDFpen: Handier than Acrobat (More affordable, too!)

SmileOnMyMac’s PDFpen 4 is a PDF editing tool that does not require Adobe Acrobat. It lets you edit blocks of text, as well as move, resize, copy and delete images and entire pages. It also retains rich text formatting, supports copy and paste over multiple columns, and provides simple OCR.

For many people, the most useful feature is that you can add your signature or other graphic anywhere on the PDF — I use it for signing forms all the time. Its handy Library feature lets you store your favorite items, from text snippets to placed graphics (signature!), scribbles and annotations.

The Pro version lets you create fillable PDF form fields and a table of contents.

The regular version costs $50, while the Pro version costs $100. Both are available only for Macintosh.