Free dynamic software for linux

Returnable is a methodology for using URLs to specify the dynamic generation of content, its delivery, and its behavior. The project is implemented with JavaScript code which is to be embedded in HTML documents and which communicates with server-side scripts.
The Web page author then can use < returnable > tags within the page to create widgets that respond to events. Currently, only a tooltip widget has been implemented.
Enhancements:
- Support was added for HTML within tooltips.
- The allowed events are onhover and onclick.

dynamic window manager or dwm is a dynamic window manager for X11.
As founder and main developer of wmii I came to the conclusion that wmii is too clunky for my needs. I dont need so many funky features and all this hype about remote control through a 9P service, I only want to manage my windows in a simple, but dynamic way.
wmii never got finished because I listened to users, who proposed arbitrary ideas I considered useful. This resulted in an extreme CADT development model, which was a mistake. Thus the philosophy of dwm is simply to fit my needs (maybe yours as well). Thats it.
Main features:
- dwm has no Lua integration, no 9P support, no editable tagbars, no shell-based configuration, no remote control, and comes without any additional tools like printing the selection or warping the mouse.
- dwm is only a single binary, its source code is intended to never exceed 2000 SLOC.
- dwm is based on tagging and dynamic window management (however simpler than ion, wmii or larswm). It manages windows in tiling and floating modes. Either mode can be applied dynamically, depending on the application in use and the task performed.
- dwm doesnt distinguishes between layers, there is no floating or tiled layer. Wether the clients of currently selected tag are in tiled mode or not, you can re-arrange all clients on the fly. Popup- and fixed-size windows are treated floating, however.
- dwm is customized through editing its source code, that makes it extremely fast and secure - it does not process any input data which hasnt been known at compile time, except window title names and status text read from standard input. You dont have to learn Lua/sh/ruby or some weird configuration file format (like X resource files), beside C to customize it for your needs, you only have to learn C (at least editing header files).
- Because dwm is customized through editing its source code, its pointless to make binary packages of it. This keeps its userbase small and elitist. No novices asking stupid questions.
- dwm uses 1-pixel borders to provide the maximum of screen real estate to clients. Small titlebars are only drawn in front of unfocused clients.
- dwm reads from standard input to print arbitrary status text (like the date, load, battery charge). Thats much simpler than larsremote, wmiir and what not...
- It can be downloaded and distributed under the conditions of the MIT/X Consortium license.
- Optionally you can install dmenu to extend dwm with a wmii-alike menu.
Enhancements:
- This release contains certain major bugfixes, especially regarding banning/unbanning client windows.