Drop down menu to organize links?

I have been looking for a specific plugin and have had no luck (I don’t know if it even exists), so I thought I would ask.

I have several affiliate websites for my blog (www.crazyforsavings.com) and I am looking for a plugin that would help me organize/bookmark the different sites so can keep track of them easier. Currently when I am typing, I have to go back and forth to the website and copy & paste the link into my blog. Instead I thought it would be easier to selected the “bookmarked” website from a drop down menu.

Anything like this out there?