PicoPDF (AKA: PicoPDF PDF Editor) is a small, easy-to-use and full-featured PDF editor for Windows and Mac platforms, developed by NCH Software from Australia. The first time you use it, you will seriously doubt whether it really works. Because for a PDF editor that only has a 1M+ file size and does not rely on any components such as .NET, it's harder to implement than a PDF reader.

PDF Shaper is a free and very practical all-in-one type of PDF managing tools box from Spain. Its functions cover almost any aspects of daily PDF files managing operations. Although the inbuilt functions are numerous, it comes with small file size and low system resource occupancy. Plus, because of its intuitive and elegant user interface, users are able to get started with it in no time! In a word, it's a necessary and efficient PDF toolkit.