nonpas - There is a free developer program membership, and the Safari program is also free. But I am not certain of the specifics of what resources are available. Quartz Composer may or may not be in the downloads for free accounts. However many things are still offline. Like registration for new accounts.
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I have also noticed that once logged in I haven't needed to re-log every time as in the past. It could be an improvement was made to the portal.
Likewise although the dev centers are back, if you are a registered developer with beta access and took advantage of software update last Monday you'll notice the corresponding builds are not yet posted. I would expect a new Xcode preview and other goodies to be posted sooner or later, perhaps this upcoming Monday?