Sam Spade is a general-purpose Internet utility package, with some extra features to help in tracing the source of spam and other forms of Internet harassment. Also provides an online resource section with some web resources, mailing lists and newsgroups relating to spam.

Spam Combat Features web-based versions of tools which can be used to perform name lookups, traceroutes, etc.

CAUCE, The Coalition Against Unsolicited Commercial Email is an ad hoc, all volunteer organization, created by Netizens to advocate for a legislative solution to the problem of UCE (a/k/a "spam"). Also provides a list of links to sites devoted to spam-fighting and related activities.

suespammers.org is a legal resource for recovering from damages caused by e-mail vandalism and includes a summary of state antispam laws.

AOL Junk E-Mail Features a collection of various court decisions, legislation, and links to resources.

Tracking Down and Suing E-Mail Harassers is an article from The National Law Journal about when employees are harassed in the workplace with e-mail from unknown sources, an attorney must wear three hats: lawyer, technician and private eye. How does a lawyer even begin to track down and bring an anonymous e-mail harasser to justice? It's a whole new world. Start by tracing IP addresses and move on to suing John Doe.