Well...... If all you want is to be able to set up a links directory, take a look at the one we set up on our site -
http://websitegurus.us/links - and see if it looks like what you want. It was easy to set up, but you can always try it in a non published folder to play with it befor going public(that's what we did). It allows the person who submits a site to alter it when needed by use of a password they set up, and lets you to decide if you want them on autopilot or if you want to aprove all links. It has some pruning abilities as well. We set it up for anything and everything dealing with websites, programming, headhunters, training, etc, and that's what we try to limit it to. Your site could fall under the heading of "Supplies ad Equipment", so if you want to add your link to try it, go ahead. I set up a catagory named that just for you to try it.
Oh yea, it was free as well. Being as we treat the job board as a public service(meaning free if you follow the guidlines), cost was an issue for us.
It's worked for us so far, the one and only thing I've not been totaly pleased with is the spiders follow the "report dead link" link. That's probably just because I've been unable to sit down and redo the robots.txt file corectly though.
If it looks like it will do ya, it's from
http://www.dbmasters.net I believe, though there is a link to them at the bottom.