PageCat HTML Editor
I have added an HTML editor to the article editor of PageCat. It's working out quite nicely. I have a couple of features that I would like to add to it (for which I even have source code, just haven't integrated them yet), including a MS Word HTML cleanup script and a graphical table creator.
The MS Word thing is very handy. If you've ever had to edit a web page someone else created in Word you know what I mean. It puts all kinds of extra tags into the HTML that make it very hard to read. It also uses all sorts of <font> tags, which are just yucky. This script I stole from some other site has a bunch of regular expression replaces that do away with all of the Word yuckiness.