Free if you want to software for linux

PDF Download is an extension which allows you to choose what to do with a PDF file on a website.

Allows to choose if you want to view a PDF file inside the browser (as PDF or HTML), if you want to view it outside Firefox with your default or custom PDF reader, or if you want to download it!

Matware NTN is a library written in Javascript that will allow you to create really dinamic sites without recharging the page.
Comming soon is going to have MySQL support that is going it to make an application really interesting.
This software this under development.
If you want to distribute, copy or modify Matware NTN, you are welcome to do so under the terms of the GNU General Public License.
Enhancements:
- This release adds the XML Object from gazingus.org and many bugfixes.

No New Window forces Firefox to never open links in a new window automatically.

If you want to open a link in a new window, you can still do that via the context menu, but if a website author specifies that a link should open in a new window, that is ignored.

Please note that this extension is not needed anymore (and does, indeed, not install) in Firefox 1.5, as that version offers the desired behaviour as a configuration option.

Glirnath is a Web utility to browse and play audio files on a remote Unix computer dedicated to be a music jukebox. The Glirnath is not a music streamer to the local computers, but rather acts as a remote agent to play music on the server itself (hook it up to your stereo or something).

Access can be controlled by a special list of IP addresses contained on the server, so its mostly safe, although if you want to let a whole lot of people control the music playing on your stereo, thats up to you.

Try it out and see for yourself. Theres some screenshots over to the left to show you what its all about.

ccontrol program takes over the roles of the compiler and linker, and reads a configuration file to decide what to do before invoking them.
This is particularly useful for centralized control over commands and options, such as enabling distcc(1) and ccache(1).
I recommend installing dietlibc if you can; the resulting (static) binary is smaller and cuts a few percent off compile times.
If you want to install ccontrol in your home directory (eg. ~/bin), use "./configure --bindir=$HOME/bin". Otherwise, a simple "./configure" will place the binaries in /usr/local/lib/ccontrol, which you will have to put in your PATH.
The type "make" and "make install". Now run "./ccontrol-init" to create your ".ccontrol/default" file. If you want to avoid probing for distcc hosts on the local network, set DISTCC_HOSTS first, eg:
DISTCC_HOSTS="one two three" ./ccontrol-init
Enhancements:
- A GNOME applet for changing symlink was added.
- A portability fix was made to allow the software to work on PPC.
- Better performance and less thrashing is exhibited with ccache and distcc when ccache mostly hits.

You Only Live Once is a Seven Day Roguelike game.
Main features:
- Extremely tactical combat. There is no randomness in combat. You always hit and always do full damage. This means that careful placement is the difference between success and failure.
- Heavy on plot and characterization. A story is told. It is not just kill things for no reason. (If you want to just kill things for no reason, POWDER is recommended)
- Quick to complete. You can likely fully explore and enjoy the game in an hour or two. You are then free to get on with your life.
Enhancements:
- Version 005 sees the mac-curses build not be distributed. Instead, youll have to content yourself by compiling it by hand out of the macport directory.

TuxGuardian is an application-based firewall. TuxGuardian was developed after the observation that Linux security applications were not tailored for lay users. With TuxGuardian youll be able to implement access control policies to the network resources in order to identify and control every application that tries to access the network.
All this means that now you can make your machine secure by controlling and forbidding transmission and reception of data by unauthorized applications.
TuxGuardian makes use of the latest security mechanisms included in the Linux kernel 2.6, such as the LSM framework, and is really simple to use (thats the intention!).
TuxGuardian is free software distributed under the GNU GPL, which means that you can help too!.
TuxGuardian can be used in the next situations:
If you want to protect you computer against spywares, trojans and other evil pieces of software;
If you want to have an additional layer of protection working on a per-application basis,
besides a packet-filtering firewall or other low level security mechanisms;
If you want to stop backdoors and rootkits which modify the expected behavior of your applications from accessing the network;
If you want to implement the internal security of your network (this is specially useful since ordinary firewalls usually only take care of external threats);
If you want to implement an extra security layer in your network, in addition to the one provided by institutional firewalls and gateways;
Main features:
- Detects unauthorized applications trying to act like a client or a server;
- Operates with or without user intervention;
- Verifies the applications integrity so that maliciously modified software wont be able to send or receive data through the network;
- Uses a three-layered architecture of independent modules, which eases the task of addings new features and functionality;