compare software

[Erez D]

Hello,

We have developers which are used to work under windows (visual studio)
We are now writing code for linux using linux.

So i let them use Eclipse as an ide (i myself use vim).
now for a diff tool (i use vimdiff), they are used to beyond compare
i know i can get a linux version of beyond compare. but i preffer open
source.

i was told, that for instance, you can tell beyond compare to ignore
comments, or ignore regexps.

is there an open source alternative ?

can i do that (ignore comments) in vimdiff (without filtering)

thanks,
erez.
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