Free can also use software for linux

wxCam is a webcam application for linux. It supports video recording (in an uncompressed AVI format), snapshot taking, and some special commands for Philips webcams, so you can also use the program for astronomy purposes.

It supports video for Linux drivers, so it should work on a very large number of devices.

BeanCounter enables stockmarket data analysis and performance evaluation.
Ever wondered what happened to your portfolio on a day the market moved 500 points? Ever wondered what your portfolio returned over the last (odd and arbitrary) period? Ever wondered what the Value-at-Risk (VaR) was? Ever wondererd what the marginal risk contribution of a given stock in your portfolio was? Ever wondered what unrealized percentage gain (or loss) you made from the recent lows (or highs) ? Ever wondered if you could easily database the (public) price info on dozens of stocks for further analysis? Ever wondered if there was a simple cron job to report all this on a daily basis?
BeanCounter does all this, and provides an easy-to-use command-line tool as well as a Perl module that can be used with other pursuits. It stores its data (price, volume, earnings --- whatever Yahoo! supplies) in either a PostgreSQL or MySQL relational database system (but it can also use an ODBC connection). The (very fast) SQLite database on a flat file can also be used in either version 2.* or the newer version 3.*.
BeanCounter works with equities and equity indices from exchanges in the US, Canada, Europe and Asia. Options, foreign exchange rates, some commodities as well as US mutual funds are also supported as the data is provided by Yahoo! Downloads are efficiently batched so that information on e.g. several dozens US stocks is downloaded at once with a single HTTP request.
At some level this code is still beta in the sense that the command-line options and function interfaces might change. However, similar code has been working here since the fall of 1998.
Enhancements:
- Historical backpopulation now also adjusts closes, and the rpm.spec file has been updated.

brandgang is a http firewall tunneling for Java applets with restricted network.
You should install the software like this:
Extract the archive to a (home-)directory. For now there are no
installation scripts or further installation instructions.
tar -xzvf brandgang-0.1.xxx.tar.gz
WinZip users check: TAR file smart CR/LF Conversion.
You will need to create directories "var" and "lib" by hand, if your
archiver ignores empty directories. Check MANIFEST for anything
missing.
Main features:
- This transparently uses the browser configured proxy, simulating duplex communication, by multiple java.net.HttpURLConnections to a http tunnel server, that forwards the connection. Because no reference to the proxy is made, no security exceptions will be thrown for restricted applets.
-
- A combination of encryption (RSA/RC4) and message digests(MD5) is used in an effort to secure an insecure datapath. Though this comes with only a (small) telnet and SSH client, it is supposed to be easy to modify other networking applets to use tunnels.
-
- You can still use modified clients for direct connections over tcp sockets. You can also use secured connections to the tunnel server over a common tcp socket, and have the connection forwarded.
-
- The tunnel server can forward to multiple servers, handling multiple tunnels concurrently. The tunnel server can handle requests from http clients for files,
- so you dont need to run any (other) httpd to host the applets. The tunnel server can be used to enable access to a LAN. You can allow accepting and connecting hosts for the tunnel server (besides setting a Java security policy).
-
- Both server and clients are written in Java.

Albatross library is a small and flexible Python toolkit for developing highly stateful web applications.
The toolkit has been designed to take a lot of the pain out of constructing intranet applications although you can also use Albatross for deploying publicly accessed web applications.
In slightly less than 2600 lines of Python (according to pycount), you get the following:
An extensible HTML templating system similar to DTML that promotes separation of presentation and implementation for improved program maintainability. The templating system includes tags for:
- Conditional processing,
- Macro definition and expansion,
- Sequence iteration and pagination,
- Tree browsing,
Lookup tables to translate Python values to arbitrary template text. The ability to place Python code for each page in a dynamically loaded module, or to place each page in its own class in a single mainline.
Optional sessions, which can be either:
- Browser based sessions via automatically generated hidden form fields (cryptographically signed to ensure integrity),
- Server-side sessions via a supplied TCP session server,
- Server-side file based session store.
Applications that can be deployed as either CGI programs or as mod_python module with minor changes to program mainline. Custom deployment can be achieved by developing your own Request class.
Over 120 pages of documentation including many installable samples. A primary design goal of Albatross is that it be small and easy to use and extend. The toolkit application functionality is defined by a collection of fine grained mixin classes. Eight different application types and four different execution contexts are prepackaged, allowing you to define your own drop in replacements for any of the mixins to alter any aspect of the toolkit semantics.
Object Craft developed Albatross because there was nothing available with the same capabilities which they could use for consulting work. For this reason the toolkit is important to Object Craft and so is actively maintained and developed.
Albatross is licensed under a liberal BSD open-source license.
Enhancements:
- Improvements and fixes were made to < al-for >, < al-macro >, < al-option >, NameRecorderMixin, and the FastCGI driver.

kpictorial project is a logic game for KDE.

Goal of the game is to reconstruct a black & white picture by the number of contiguous black blocks given for each row and column. Sounds easy but isnt.

You can also use 1bit indexed color palete xmp and xbm files created by the gimp.

Nuhe is a rule based log monitoring system, which is capable of action when rules are matched againsts log(s) activity. Default Nuhe mode is to run on background (daemon), but it can also be used in foreground and log analyzer mode. Log analyzer mode just analyzes given logs and prints results to stdout; no action is taken when Nuhe is in analyzer mode.
Motive for Nuhe development started from security point of view and one purpose is to use it as a intrusion protection system that can react against certain kind of log activity. You can also use Nuhe as a vanilla "log filtering" system, that detects events from logs, logs them, but does not react against them.
One example of Nuhe usage is to use rule that detects multiple SSH connection attemps and drops IP address (e.g. with Linux iptables) where connections are coming. Nuhe is very handy in this situation, because user can configure it to ignore important IP addresses, so theyre not blocked by firewall and specify events to be indentified only by IP address information.
With that rule and action handler user can paralyze brute force attacks. However Nuhe can be described as a general rule based monitoring system which can run system commands in phases based on time and event criteria and hopefully this gives many areas of use for it.
Enhancements:
- Added reset string functionality for actions, reset strings are used to to discard associated events.
- With "lastmsg" parameter (in nuhed.conf) you can match syslog "last message repeated n times" string. Nuhe process previous syslog entry as many times as it was repeated.
- More support for upcoming nodemanager and some bug fixes and changes.

AlsaMixer.app is simple mixer dockable application for WindowMaker running on Linux with ALSA drivers (>= 0.9.x). In another way, its dockable application for WindowMaker (but you can also use it in AfterStep, BlackBox, ...) window manager.

AlsaMixer.app can control up to three volume sources, store/load mixer setting and run external applicaton on middle click. Nearly whole sources was taken from Mixer.app only ALSA mixer part was added.

To install, download source codes, then:

tar xvfz AlsaMixer.app-0.1.tar.gz
cd AlsaMixer.app-0.1
make
make install-x11 or download i586.rpm file and
rpm -ivh AlsaMixer.app-0.1.i586.rpm
or download src.rpm file and rebuild it and install.