One thing I'd love to find is tech that can automatically categorize your contacts, whether based on your contact file itself (eg Google Contacts) or on LinkedIn (which would be even better).
The idea is I could request a list of everyone who I know who is at a Fortune 500 company, or works in the entertainment industry, or who works at a VC firm. I'd then ideally be able to sort that further by role or seniority, etc, along with geography.
And again, this is all for people I know already when I don't want to look by company. Does any off-the-shelf tool do this?