Power-drag is simply cool. Probably I should call it "awesome script"? Pressing your shift key then hover textareas, select boxes, iframes, objects, images or input fields to simply resize them by dragging its lower right corner. Simple, clean and efficient. Double click to restore the original dimensions. You can enable the dragging corner always, or use another modifier key. The script requires shift by default because makes the script less intrusive, and does not cover small elements in the page, while having a smaller performance impact.
A great YouTube script adapted to work with Opera.
Hi, I took some time to make the YouTube HD Ultimate userscript (http://userscripts.org/scripts/show/31864) work with Opera latest stable release. There is still some work to do, but my modifications make it work with Opera too (still working on FF of course!).
This script scales down images viewed by themselves so that they can be seen in their entirety if they are too large for the window. It is simple to use, works with both raster images and SVG, and is configurable using UJS Manager.