When the L0pht became part of atstake, a security consulting company, their tools were acquired as well. You can find tools, like l0phtcrack and dcetest at http://www.atstake.com/research/tools/
BindView (a security consulting and software vendors) papers, including Michael Zalewski's paper on TCP sequence number insecurities: http://razor.bindview.com/publish/papers/
