A great way to add twitter to your website without having to write anything in backend code. Also deals with cases where twitter is down
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Getting Redmine installed on CentOS can be a bit of a minefield given the various versions of all the components required for it to run correctly but this excellent tutorial will get you up an running with few headaches. The version of redmine, and the components may not be as up to date as they could be but the combination chosen works!
Another really useful item from Oleg Burlaca. AreoSQL is a free web based database management solution which, given some development could be a decent replacement for the awful phpMyAdmin. I say awful, phpMyAdmin is in a lot of ways actually a pretty good tool, however it's also notorious for going wrong when you least expect it and, to be honest needs a throrough interface overhaul. AreoSQL doesn't provide anything like the level of functionality that phpMyAdmin does (yet) BUT the interface is better, especially for people who like to use a componentised view of databases as a lot desktop app's provide. Overall I personally don't think it's going to beat other projects like Chive ( chive-project.com ) to being an immediate successor to phpMyAdmin but it's certainly an alternative to be considered...
More here: AeroSQL an alternative to phpMyAdmin