I came across the PDF Hammer site that allows you to edit PDF documents online. It is free, extremely easy-to-use and runs directly from any Web browser. I thought it might be a useful tool for teachers and students so I gave it a try. Despite it is a simple PDF editor, PDF Hammer works as it claims in its Website. You don’t have to register either, just upload a PDF file and then rearrange the pages or delete some pages and finally export as a new PDF document. You can also upload multiple PDF files into your project and PDF Hammer can reorder, delete, and combine the files into a PDF file. PDF Hammer is worth a bookmark. Currently, it is in beta with promises of adding some more features like rotating the pages, adding watermarks and stamps to pages in the near future.