Natural CLI is a Java library that provides developers with an easy way to use human readable command line interfaces. This means that your software can understand easy command lines like "$acme start daemon mailservice", "$acme send file /tmp/pau.jpg to friend", or "$acme start backup in 10 minutes". Command lines are very easy to define.
IT Mill Toolkit is a server-side RIA (Rich Internet Application) library that provides a versatile set of AJAX widgets for Java programmers. Applications are programmed in Java and executed server-side. At the client-side (i.e. in the browser), enhanced GWT widgets are used for presentation.
Webwidgets is a framework for writing Web applications as if they were desktop applications. It employs the same programming paradigm as GTK, Qt, etc. with a tree of widgets with callbacks for events such as a button press. It encapsulates page loads, session data, form handling, etc. into widgets with their own state. Webwidgets is focused on code reuse, rapid prototyping, and separation between graphic design, interaction design, and application logic. It is implemented in Python and uses the Webware application server framework.
123 Protect is a solution to manage member accounts on a Web site and protect resources on the site with passwords. Passwords can be used to protect the whole site, individual pages, and directories. Password protection recursively applies to contents of a directory. The system provides three levels of administration, a user-friendly interface, an advanced membership management system, and multi-language support. It doesn't require knowledge of PHP or HTML.
Optnik is a CLR library to help with option parsing and command execution. It is very similar to Mono.Options but has support for sub-commands, each with its own private set of options. Optnik is written in C# and runs on Mono and MS .NET (and probably on other CLR implementations too).