What is defined as a "Recruitment Tool"?
Is it the database system they use?
Is it Social Media - LinkedIn, Facebook etc.?
There are so many but here are a few "tools" to add extra benefit to recruiters.
To help build those LinkedIn networks while you browse try WhoWorks.At a quick and simple plug in.
HootSuite allows you to manage and measure multiple social networks. Direct integration from TriSys to Hootsweet is also available for job posting across different social media.
Assignments by HootSuite quickly and easily assign Tweets and Facebook messages within your team.
Google Alerts lets you receive update e-mails based on your queries allowing you to monitor news, competitors or even a little bit of celebrity watching!
Let me know any other great tools that you may have come across.