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http://commonphp.blogspot.com/ (from a Hacker News discussion about the first link above: http://news.ycombinator.com/item?id=782370)
Some Hadoop links I had bookmarked:
ZooKeeper (part of Hadoop but doesn't appear to require it?)
Proper (and Improper) Usage of Memcached
While the above says don't use memcached for sessions, others have other ideas--are they wrong?
This might be what's needed if you want to do sessions, etc. w/memcached--patches for memcached which add replication:
Includes web-based services, Linux app, etc.
Includes everything from Google to Photoshop to PHP, Ruby, JQuery, etc.
There's a link around the end of the comments to a sample app too.
There's a bunch of stuff in the comments, everything from the old print '';var_dump();print '';
Anyway, check it out for various ideas/tools:
A list of wireframing tools, from free to expensive: