PDF Buddy

PDF Buddy is a web application that allows users to edit and manipulate PDF files online. Features include the ability to add text and other annotations, insert images and signatures, and split and merge files. The program works with common web browsers, and has become a popular alternative to traditional PDF software for Chromebook users.
Features
Annotation
PDF Buddy includes tools for adding a variety of annotations, including
* Text
* Drawings
* Symbols (e.g. checkmarks)
* Shapes
* White outs
* Highlights
Images
Users can add images to PDF files, resize them, and save them in a library for future use.
Pricing
PDF Buddy is a freemium product: Users are allowed to edit a certain number of documents a month, after which they must pay for additional credits or an unlimited subscription. Other features like splitting and merging are always free.