Awesome!

Have to give 5 start because it does what it says!
After some CSS tweaking, the widget looks exactly as I wanted!

However, there are some improvements that can be made, like keeping the hidden links deactivated or ajax load them when clicked.

For blog with hundreds/thousands of posts, this will make things load a little faster and probably keep them more SEO friendly. Having a page with 800 links to you own site is probably not good ??