Hi all,
Here it's http://www.giis.co.in/giis/ , ext4 undelete tool.giis-ext4
uses ext2fs lib and sqlite,thus provides better/best performance than
giis for ext3.

giis-ext4 has less than 1000 LOC which is almost 5 times less original
than giis and  giis-ext4 took just around 6 weekends (approx 15
days  , 2hrs / day) thanks to ext2fs library :)

Feedback/comments on giis-ext4 are most welcome.

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Cheers,
Lakshmipathi.G
www.giis.co.in