exJello is a JavaMail provider that connects to a Microsoft Exchange server (actually, it uses the WebDAV interface exposed by Outlook Web Access). It is designed as a drop-in replacement for the standard POP3 and SMTP providers. This allows you to send and receive messages through your Exchange server in situations where a POP3/SMTP interface is not available (through a restrictive firewall, for example, or if your administrator simply does not provide a POP3 or SMTP gateway).
RenderConfig allows the definition of a set of modifications that can be used to transform (or render) a set of source files to provide tailored configuration specific to a particular instance of an application. A typical use case for this is where your application requires a set of configuration files that identify multiple servers that provide particular application services. These application servers will differ depending on whether you are running the application in development, testing, or in production. With RenderConfig, at build time you can explicitly produce a set of configuration files that support all of these configurations, providing the ability to ship the configuration with the other build artifacts.
Clickity is a tray-icon program to simulate mouse clicks and drags that are hard to perform because of limited hand use or limited pointing hardware. It runs on any X system with tray icons, as well as Microsoft Windows, and doesn't require an integrated desktop environment or accessiblity framework to be installed. Clickity can be activated by holding and then releasing the left mouse button or by moving the pointer and letting it dwell in position. Actions include single clicks, double clicks, and drags of the left, right, and middle buttons, as well as scroll wheel motion.
Gow (GNU On Windows) is a lightweight alternative to Cygwin. It uses a convenient Windows installer that installs about 130 extremely useful open source Unix applications compiled as native Win32 binaries. It is designed to be as small as possible, about 10 MB, as opposed to Cygwin which can run well over 100 MB depending upon options.
Refinery is a Ruby on Rails content management system for small business sites where the client needs to be able to update their Web site themselves without being bombarded with anything too complicated. It is truly aimed at the end user, making it easy for them to pick up and make changes themselves.