LibraryBox is an open source, portable digital file distribution tool based on inexpensive hardware that enables delivery of educational, healthcare, and other vital information to individuals off the grid.

CAcert.org is a community driven Certificate Authority that issues certificates to the public at large for free.
CAcert's goal is to promote awareness and education on computer security through the use of encryption, specifically with the X.509 family of standards. We have compiled a document base (Wiki) that has helpful hints and tips on setting up encryption with common software, and general information about Public Key Infrastructures (PKI).
For the enthusiast looking to dip their toe in the water, we have an easy way of obtaining certificates you can use with your email program. You can use these not only to encrypt, but to prove to your friends and family that your email really does come from you.

For administrators looking to protect the services they offer, we provide host and wild card certificates which you can issue almost immediately. Not only can you use these to protect websites, but also POP3, SMTP and IMAP connections, to list but a few. Unlike other certificate authorities, we don't limit the strength of the certificates, or the use of wild card certificates. Everyone should have the right to security and to protect their privacy, not just those looking to run ecommerce sites.
If you're extremely serious about encryption, you can join CAcert's Assurance Programme and Web of Trust. This allows you to have your identity verified to obtain added benefits, including longer length certificates and the ability to include your name on email certificates.

The default log format offered by apache is only semi-structured. It appears, as a human reading it, to have some kind of reasonable structure. However, to process this with the logstash grok filter, it requires a complex and expensive regular expression to parse it.
The best case for log formats is if you can simply emit them in a structured format from the application itself. This will reduce any extra parsing in the future!

The original MySQL API is going away, deprecated by PHP in Version 5.5, with published statements that it will be removed in the future (see the red warning box).  Since PHP 5.3 is now (February 2013) at end of life, and PHP 5.4 is current, the issues that will arise from the deprecation and removal are already before us.  In fact, some parts of the API are already deprecated. It's time to think about making a change in our scripts.  And if you're thinking about PHP 5.5, it's necessary to make the change now: "Please, note that this alpha version [php 5.5.0alpha2] also introduces the ext/mysql depreciation."

The Uniform Server is a WAMP package that allows you to run a server on any MS Windows OS based computer. It is small and mobile to download or move around and can also be used or setup as a production/live server. Developers also use The Uniform Server to test their applications made with either PHP, MySQL, Perl, or the Apache HTTPd Server.

This resource starts with the basics of MongoDB and goes on to describe the query language, advanced clustering configurations, administration, and more. It also includes a thorough glossary and command reference.