I'm looking for a good link checker/crawler/bot. Requirements are:
1. Must be able to check up to 10,000 links in a site;
2. Must be able to automate scheduling so that the checker runs automatically at a set time every day;
3. Must be able to schedule up to 7 websites, either simultaneously or consecutively.
We are currently running an old version of Watchfire's Linkbot, but Watchfire seems to have changed their focus to web security.