There are lots out there and it always helps if you can take some time to test a few yourself to see what fits your work style best. I do NOT recommend the script Reciprocal Manager. I have a client who uses this and it's been nothing but a pain to deal with. I get tons of errors when doing a reciprocal link check which means I then have to go through and manually check backlinks. It's also setup in such a way that it makes it very hard to batch edit links. Doing one edit usually means clicking through four or five pages. Supposedly they released a new version that addressed these issues, but then they pulled in back due to all the bugs.
You could check out LinkAssistant or SEOStudio. I use both products for various reasons but they are both worth taking a look at. I don't use them for actually posting links, but I use them to make sure my links still exist, hope that helps!