The link free
To start trading links, you must upload links page to your site.
Reciprocal link manager that automatically sends requests for new links and checks for added links, removes 404s and creates links page.
Softbiz Automatic Link Checker
Link validator tool written in PHP helps to check automatically if a page contain a link back to site. Helpful especially in link exchange or link popularity campaigns.
Dynamic Link Promoter
Link promotion and management software to manage reciprocal links, generate new links, and build link popularity.
Link Checker Pro
Analyses websites for broken and problem links with data export options to HTML, Excel, and text formats.
Link Popularity Tools
Offers link popularity tools, including a free downloadable link popularity checker, and articles explaining link popularity and how to increase it.
Reciprocal link exchange directory with links organized into categories.
Find reciprocal link partners for free.
GentleSource Link and Bookmark Manager
Link manager can be used as link section of a website or a personal bookmark manager. You can publish links/bookmarks or hide them behind a login. [Free for private usage and non-profit organizations]
Web Link and Link Checker
Utilities for verification of links accuracy, existence and availability. Using this powerful tool webmasters can find broken links or links containing syntactic errors.
Links and Law
Comments by Tim Berners-Lee, inventor of the World Wide Web, about the freedom to link.