in spite of AOL/TimeWarner's ownership of Netscape, the Mozilla browser (which Netscape is based on) is an open source project.
Now, if you like the basic features and functionality of Netscape, but don't want certain cumbersome "plug-ins" I would highly suggest
www.mozilla.org to download the Mozilla browser in it's purest form. Netscape 7 may be in the preview stages, but the Mozilla browser recently had a "final" release (ver 1.0)
Mozilla1.0/NS7 has the same option to turn off popups that Opera has. Big plus
I like both IE6 and Mozilla1.0 (NS7). Feel free to experiment with each.