Using the free image-editing application GIMP you can create custom text and outline it with a border in the color of your choice. The key is to use GIMP's layer tools.

How to Add Text Using Gimp. Gimp is an open source image-editing software program available for Linux, Windows and Mac OS X. It consists of three windows: the toolbox, the image window and the dock.

Learn how to add a Canvas and how to change Canvas background color in GIMP. Change layer from empty to white, transparent or any solid color.