Gimp is normally used to create or manipulate images files, but can also work with PDFs if you understand how it works and what it's limits are. If you’ve never used Gimp—a free image editor available ...

Pixlr is a free photo editor you use online by visiting its website at pixlr.com or download as a mobile app on a smartphone or tablet. The mobile version was formerly known as Pixlr Express. However ...