I will start this list with my favourite directory resource website.

Address: http://www.directorycritic.com/

Advantages:

1. Directory List categorized in 5 different ways plus Niche list categorized in 22 groups.

2. Active status.

3. Really good advertising options.

4. Excellent start pointer for people that start trip with SEO.

5. Very fast response.

Disadvanteges:

None for the time being.