Modules that are designed to be 'use'd from within your ~/.perldb file. That is, things that are meant to modify how perl5db.pl operates, to a limited extent.

• DB::Color — syntax-highlighting for Perl code, within the debugger
• Devel::Command and friends (last updated Feb 2008)
• DB::Pluggable and friends (last updated Jul 2011)
• Debug::Runopt
• DB::ColorPrompt — Use ANSI colors to highlight your prompt within the Perl debugger
• Data::Printer
• Data::Tersify::perldb
• HTML::Mason::Request
• PDLdb.pl — though this is more of a modification of perl5db.pl
• TextMate::JumpTo
• ? perldebug.pod#ornaments ?