Jazzy
With virtually instant insertions of sites, Jazzy is doing a fantastic job and seems to be growing quickly. They have a number of affiliations with popular sites including the Cool Doctor's Cool Sites. To add your site simply use the add site button and then select your category of choice.

Jayde
This is a great site to use. Jayde was recently sold and as a result new life was breathed into it. Postings are done quickly and they get a large amount of traffic so go ahead and submit to take advantage of that fact.

JBlue
A fast search engine that is very basic but simple to use. Simply add your site by typing in your URL for the spider and press submit. The results here are very fast and so it may start to attract users in the future.

Josh's Sanctum
The opportunity to save time is offered by this search engine. By submitting your site to Josh's Sanctum you are given the option to submit the same link to 12 different engines including this one. This has appeal to some and, as such, is worth the effort. Select the category from the add link form.

Jump City
This seems to be a very interesting site that is very selective on who they add to their directory. Adding a site is complicated until you know the secret... simply email the owners at mail@jumpcity.com and tell them about your site.