Highrise is an on-line Contact Relationship Manager built by the Ruby on Rails/Backpack/Basecamp company
http://www.37signals.com/.
It allows infinite numbers of phones and addresses, etc., and has user-defined tags as well as Cases, which connect various Persons and Companies together on a project. You can enter notes for any contact as well as forwarding emails to a
dropbox, which parses the email addresses and puts it in the correct contact's history.
They offer a free account with a maximum of 250 Persons and one Case. More usable accounts are by monthly subscription.
Highrise Inquirer adds some features not available from Highrise:
- bulk-tagging
- selection/filtering based on any, wildcard text in any field
- bulk deletion (with lots of warnings)
- backup/restore contact and note data to/from XML
- duplicate and bad data detection
Highrise Inquirer is a single Windows application file: just download it and run it.
Check out the Highrise Inquirer web site here:
http://highriseinquirer.santacruzsoftware.com 
