The Link System package provides a cool way for you to manage categories of links across your site.
It allows your users to suggest their own links (with optional captcha and email validation), which you can approve from within the dashboard. Links can optionally display thumbnails (generated automatically with PageGlimpse). You can also set the number of links per page, and can sort by newest, oldest, or title. If you've got a lot of links, you can even display a search field.
Want to test it out? Check out the Link System demo »
Note: If you're looking for a more basic way to manage a list of links, then check out the Link List block.