Koken is a free and self-hosted CMS (PHP-MySQL) that is focused on building websites where portfolio/gallery is in the core (like designer or photographer sites).
BugKick is an open source bug tracking and task management application (source is hosted on GitHub) that is “light” in means of features (which i sometimes nice).
Textpattern is an open source content management system, built with PHP/MySQL, that offers a flexible usage for designers, publishers/bloggers and end-users.
Those days nearly all project management applications can calculate the time that is being worked on projects to use them in various reports.
Easily copy one field data to another in MySQL
When You decide to reorganize the blog link URL to make it tidier or to reflect new focus or theme of the blog.