I like Google Newsgroups. But I have not found a convenient way to
check speling. So I fall back on XNews and use an external editor.
Recently I have tried Apple's free Safari Browser for Windows, which I
am using right now. The word "speling" above is underlined in red
(here too). When I right-click on it I get a pull-down with
"spelling", "spewing" and "spieling" suggested as replacements.
Grammar can be checked as well.
I haven't found this in any other browser. I like it. Maybe you would
too.