http://msgpack.sourceforge.net/ “MessagePack is a binary-based efficient object serialization library. It enables to exchange structured objects between many languages like JSON. But unlike JSON, it is very fast and small.” cpan Data::MessagePack
http://lpeer.blogspot.com/2010/04/switching-from-c-to-java.html Great post about challenges that one team inside of Redhat faced when they were challenged with the task of migrating C#/IIS/MS-SQL-based VM management tool into Java. The post is more interested from the project management perspective, than from the technology side.
http://elrte.ru/elfinder php, jQuery
http://forum.nag.ru/forum/index.php?s=8b3a4967a6e80673cbe5518c91520d10&showtopic=53979&pid=482449&st=20&#entry482449 pieces of info about how to compile and use ipt_netflow kernel module on centos 5
http://vger.kernel.org/netconf2009_slides/ Notes performance of the recent linux kernels on Nehalem hadrware, linux kernel bridges, DCCP protocol, visualization (cgroups), configuration protocol, etc.
http://engineering.twitter.com/ all sorts of system and software engineering info from Twitter. Also see http://twitter.com/about/opensource
http://3.rdrail.net/blog/memcached-based-message-queues/ Blog pots shows and explains how to implement simple queue system on top of memcached
http://wiki.secondlife.com/wiki/Message_Queue_Evaluation_Notes Second Life notes about Message Queue Systems
http://cpansearch.perl.org/src/MLEHMANN/AnyEvent-HTTP-1.44/HTTP.pm A Perl module that uses AnyEvent “framework” to do HTTP/1.0 requests in a parallel, non-blocking fashion
http://jeremy.zawodny.com/blog/archives/010511.html notes on existing open source queue/messaging systems