ReText

ReText is a simple but powerful text editor for Markdown and reStructuredText with "Live preview" function

Installation
Emerge ReText just as you would any standard program:

Troubleshooting
If you start ReText and upon startup get messages such as these: ReText message output then you will need to build with the webkit USE flag enabled. The way of resolving this issue is to modify your package.use file by adding :

For more information on USE flags please visit Gentoo's Official USE Flag Documentation.

Modify:

Finally rebuild your system's world. This should satisfy all related issues:

If you've done everything correctly any packages that support ICU will be rebuilt, including webkit. The above command will probably take quite a while, but having a markdown editor at your disposal is worth it, right?!