What's a good open-source debugger & memory analyzer for Windows? -

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in unix world i've been happily using gdb debugging , valgrind memory analyzation.

are there open-source quality alternatives windows?

i'm looking lightweight pieces of software need, , never in way (just gdb , valgrind).

microsoft visual studio express edition free (but not open source).

in microsoft debugging tools there's windbg debugger. free, not open source.


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