Opera 9.x supports something called widgets which can be very handy. It is possible to create your own widgets which consist of some kind of .html file, a .css file and a config file all stored inside a zip file with extension renamed to .wdgt.
The process seems rather daunting (at least to a novice like me) because one has to compose the source files with a text editor and then zip them and finally rename the zip file. Anticipating a lot of edit and test cycles I'd like a streamlined process to accomplish this.
I have in mind a program that will treat a zipped .wdgt file as an ordinary folder/directory allowing one to directly edit the contents of the files contained therein, create new files and remove them.