Tools to help read/understand perl codes??
 

Dear Gurus,
My team will be customizing sql-ledger to suit a company we are consulting for. SQL-Ledger is writtne in perl, and I would like to know if there are code analysis tools which would show flow charts, generate list of variables, do some "refactoring" (to condense the code so that we can understand it better), and a good interactive debugger for perl?.

Is there a fast way make the team catchup with what is already written. Thx.