Первая версия вынуждает внутренний механизм включать файлы относительно в... непосредственно выполняемый файл. Так, например, Вы имеете
index.php
// directly executed script (php -f index.php or from a browser)
include 'second.php';
second.php
// This is included relatively to index.php
// Actually, it is first searched relatively to include_path, then relatively
// to index.php
include './third.php';
third.php
// This is included relatively to second.php ONLY. It does not search
// include_path
return "foo";
Я бы добавил следующее для поддержки социальных сетей:
Objective Resource lets you connect an iPhone app to a rails app.
While some of the frameworks listed are Mac-only, the question "What open source Cocoa/Cocoa Touch Frameworks are out there?" has links to many quality third-party frameworks in the answers. Of those, I've used Core Plot within our robotic control software to simplify the addition of scatter plots (of course, I'm a little biased, being one of the contributors to the project).