Authored by David Zimmer, iDEFENSE Labs has released a new open source package related to malicious code analysis, titled Malcode Analysis Pack. The Malcode Analyst Pack contains a number of useful GUI driven utilities to assist in the analysis of commonly found malware. More information and source code are available on the software releases page and the bundled installer.
http://www.idefense.com/iia/labs.jsp?flashstatus=true
http://www.idefense.com/iia/labs-software.jsp#map