Pixenate is an online photo editor. It has a bunch of features as you can see below. Simply upload your photo, edit it, and either save to disk or upload to Flickr. No need to register, just upload an run!
While living more online and uninstalled, you have to register at more and more websites. I suggest you get two e-mail addresses, one that you use for registering at sites, mailinglists, forums and so on. This will probably end up on in a spamdatabase in the end antway. Then get annother one for personal e-mails.
One suggestion could be to use the bugmenot.com, mytrashmail.com or spambox online services. They offer you to get a temporary e-mail address – completely free and no registration required. Just enter the e-mail address of your choice and it will show you the e-mails send to that address. Perfect for temporary e-mails and you don’t really care about the privacy – you just want that e-mail without giving out your real one or register for a new e-mail account.