Adobe Acrobat is my best choice to edit pdf. You can check PDF Buddy, PDF Escape too. They are online PDF editor you'll ever use!
PDFBuddy does not work at all. PDFEscape tries working, but after waiting for half hour, a 1-page PDF still has not loaded.
I think its always better to change the PDF to a word document and then edit, because many a times I was unsuccessful in editing PDF online or from the free conversions.