OpenLayers Architect
While skulking about in Google Reader I ran across A handy tool for OpenLayers enthusiasts - OpenLayers Architect in Vish’s ramblings.
OpenLayers Architect is basically a GUI that generates OpenLayers JavaScript and CSS code for you. I haven’t kicked all of the tires, but it doesn’t seem to skimp on anything - looking at WMS layer properties there’s a good dozen settings I’ve neither seen or used before, and the code output looks fairly clean. It looks like there’s a social aspect to the site (sharing maps and whatnot), but I didn’t get in to that part of it.
If you’re new to OpenLayers or you’re getting stuck on some configuration settings, this looks like a really good tool for experimentation and easing the creation of OpenLayers base (i.e. page load) coding.