Lazarus is a free and open source development tool for the Free Pascal Compiler. The purpose of this project is to serve as a Code Repository, Wiki Knowledgebase and support site for converting existing components and libraries to work with Lazarus and the Free Pascal Compiler.
The stack tracer is an delphi library for help to make exception handling to informative. The library is written for Delphi 7, but i think will work also on the 5 and 6 versions.