Partiton Magic "should" do what you want, it does work with ext3 not just ext2. Ive used it before to resize & move linux partitions with out any problems, so you should be fine.

The default Windows disk tooling is inadequate, but thankfully, GParted exists ...

Linux is unique compared to other operating systems in that you're expected to have at least basic knowledge of the OS' command line. You can do pretty much everything from the command line, and ...