A while back, I accidentally right-clicked on my desktop and saw a menu item labelled Create Document. The list had only one item -- Empty File, which creates an empty text file. Not incredibly useful. But it got me thinking.
I did a bit of probing, and found that if you create a folder called Templates in your /home directory, the files in that folder will appear in the right click menu.
So, I cobbled together a bunch of article templates in the following formats: AbiWord, OpenOffice.org Writer, LaTeX, Markdown, and plain text. Note that the files don't have to be true templates -- for example, AbiWord uses the extension .awt for templates. They should be normal documents, as I'll explain in a moment.
I then copied the templates into the Templates folder, and refreshed my desktop. To do the latter, I opened a terminal window and typed killall nautilus.