Like the GIF (that's Graphics Interchange Format), the PDF (Portable Document Format) has survived and flourished through the digital age. That's partly because of its versatility: It's the go-to ...

Ditch Adobe, this free tool is all you need ...

PDF Editify makes browser-based markups and utility tasks easy, but it remains limited as a full document editor.

You don’t need expensive software for basic PDF tasks. In fact, all you need is a handful of free web-based apps.