mod_gfx is a configurable Apache module that uses libgd to perform image operations on the fly. Some of the supported image operations are: resize, resample, watermark, and crop. A couple of its special features are origin selection via URI regex and round-robin over a list of hosts.
Sputnik is a content management system (CMS) designed for extensibility. It works as a wiki out of the box, but can be extended into other things. It offers editable nodes, history and diff, user accounts with optional email validation, a flexible permission system, RSS feeds, and more. Sputnik supports access control and has editable templates. It can be used to maintain a personal Web site that doesn't look like a wiki and that only you can edit. Sputnik is easy to install on shared hosting without root accounts.
PHP Template Inheritance consists of a handful of functions which allow child templates to inherit common structure from base templates. Multiple levels of inheritance are possible. The inspiration for this project was Django's template inheritance mechanism. Templates are PHP files too, so you can do (almost) whatever you want in them.
Stash allows you to manage your band's news, tour dates, discography, and more. It provides a customizable MP3 player and RSS feeds. It has a simple interface (fill out a few forms and hit submit). You can keep your site updated from anywhere with an Internet connection. Its content can easily fit into your existing site with little effort. Include a few special lines of code and you’re done.
CppCMS is a C++ Web development framework (not CMS). It differs from most of other Web development frameworks like Python Django, Java Servlets, or C++ Wt because it is designed and tuned to handle extremely high loads, and it is aimed at development of Web sites rather then "GUI-like" Web applications.