DiskInternals Linux Reader - A freeware tool for extracting files from Ext2/Ext3/Ext4, hfs and ReiserFS partitions in Windows
Apache Karaf - Apache Karaf is a lightweight, modern and polymorphic container powered by OSGi.
Linux File Systems for Windows - Plug hard disk with ExtFS/Btrfs/XFS partitions and work with media on Windows.
GlusterFS - GlusterFS is a scale-out network-attached storage file system.
Ext2Read (Ext2Explore) - Ext2Read is an explorer like utility to explore ext2/ext3/ext4 files. It now supports Linux LVM2.
Apache ServiceMix - Apache ServiceMix is an open source ESB that combines the functionality of a Service Oriented Architecture and the modularity.