Free if you need software for linux

Zero Touch Linux Server is the easiest way to setup your back office infrastructure. If you need mail server, file server or domain controller - ZTL is perfect for you. ZTL is now a FREE product that brings together the stability of Linux and the security of Trustix or 100% binary compatibility of CentOS with a simple web-based interface.
ZTL allows you to perform administrative tasks without any special knowledge. If you need to setup a server for your office, and do not have prior experience in doing it - ZTL is for you.
Main features:
- remote administration of servers
- three levels of access
- simple and comfortable web-based interface
- one click server upgrade
- based on powerful and secure operating system: Trustix Secure Linux
- based on free and 100% binary compatible operating system: CentOS Enterprise-class Linux Distribution
- ability to install and configure Web, Mail, DNS, Domain Controler, File Server, Printer Server as well as Database, DHCP, Proxy servers, Firewall servers
Three levels of access:
Admin Level:
- manage server configuration
- install/uninstall and automatically configure appliances
- create and manage websites/domains
- use PHP plugins: SquirrelMail, phpMyAdmin
Domain Level:
- create and manage websites/mailboxes/users
- add/manage shared folders
- manage MySQL/PostgreSQL databases
- add/manage users
- manage DNS records, Apache webserver virtual host settings
- use PHP plugins: SquirrelMail, phpMyAdmin
- remove/get system information
End User (Mail / FTP user) Level:
- webmail interface
- manage your mail settings
- use PHP plugins: SquirrelMail, phpMyAdmin
- change password
- upload download files via web

python-gammu are Python bindings for Gammu library. It currently does not support all Gammu features, but range of covered functions is increasing, if you need some specific, feel free to use bug tracking system for feature requests.

Open Motif is the publicly licensed version of Motif, the industry standard user interface toolkit for UNIX systems (IEEE 1295) provided on more than 200 hardware and software platforms including HP, IBM, Linux (Red Hat, Mandrake, and SuSE), SGI, and Sun.

The `configure shell script will guess correct values for various system-dependent variables used during compilation. It uses those values to create a `Makefile in each directory of the package. It may also create one or more `.h files containing system-dependent definitions. Finally, it creates a shell script `config.status that
you can run in the future to recreate the current configuration, a file `config.cache that saves the results of its tests to speed up reconfiguring, and a file `config.log containing compiler output (useful mainly for debugging `configure).

If you need to do unusual things to compile the package, please try to figure out how `configure could check whether to do them, and mail diffs or instructions to the address given in the `README so they can be considered for the next release. If at some point `config.cache contains results you dont want to keep, you may remove or edit it.

The file `configure.in is used to create `configure by a program called `autoconf. You only need `configure.in if you want to change it or regenerate `configure using a newer version of `autoconf.

Scriptio project is an open source framework for presenting animations and educational content in a rich online experience.
Featuring an easy-to-learn scripting language for fast prototyping and production-quality development, Scriptio is designed for rich Web 2.0 applications.
Scriptio is written in JavaScript, and exploits Ajax techniques. Ajax refers to tools and methods for creating interactive web applications. If accompanying narration or sound is needed, interfaces to Flash, QuickTime, and standard audio formats are supported.
Main features:
Intuitive scripting language
- The scripting language is a simple and easy to understand. It can also be extended since it is built in JavaScript.
Rich object set
- Text, images, rectangles, lines, and circles are supported. Input controls such as buttons, text entry fields, radio buttons, and checkboxes are used for created highly-interactive instructional presentations.
Multiple audio options
- If you need a music or narration soundtrack, interfaces for QuickTime and Flash are included. A Java applet that supports audio formats of Ogg, AU, and WAV has also been developed.
Authoring Tools
- An "author mode" gives valuable feedback as you work and develop your scripts.

PycURL is a Python interface to libcurl. PycURL can be used to fetch objects identified by a URL from a Python program, similar to the urllib Python module. PycURL is mature, very fast, and supports a lot of features.
libcurl is a free and easy-to-use client-side URL transfer library, supporting FTP, FTPS, HTTP, HTTPS, GOPHER, TELNET, DICT, FILE and LDAP. libcurl supports HTTPS certificates, HTTP POST, HTTP PUT, FTP uploading, kerberos, HTTP form based upload, proxies, cookies, user+password authentication, file transfer resume, http proxy tunneling and more.
libcurl is highly portable, it builds and works identically on numerous platforms, including Solaris, NetBSD, FreeBSD, OpenBSD, Darwin, HPUX, IRIX, AIX, Tru64, Linux, Windows, Amiga, OS/2, BeOs, Mac OS X, Ultrix, QNX, OpenVMS, RISC OS, Novell NetWare, DOS and more.
libcurl is free, IPv6 compatible, feature rich, thread-safe, well supported and fast.
PycURL is targeted at the advanced developer - if you need dozens of concurrent fast and reliable connections or any of the sophisiticated features as listed above then PycURL is for you.
The main drawback with PycURL is that it is a relative thin layer over libcurl without any of those nice Pythonic class hierarchies. This means it has a somewhat steep learning curve unless you are already familiar with libcurls C API.
To sum up, PycURL is very fast (esp. for multiple concurrent operations) and very feature complete, but has a somewhat complex interface.
If you need something simpler or prefer a pure Python module you might want to check out urllib2 and urlgrabber. There is also a good comparision of the various libraries.
Enhancements:
- This release allows callable objects as callback functions.
- It adds the NEW_DIRECTORY_PERMS and NEW_FILE_PERMS options from libcurl 7.16.4.

Linux::DVB is a Perl interface to (some parts of) the Linux DVB API.

SYNOPSIS

use Linux::DVB;

This module provides an interface to the Linux DVB API. It is a straightforward translation of the C API. You should read the Linux DVB API description to make any sense of this module. It can be found here:

http://www.linuxtv.org/docs/dvbapi/dvbapi.html

All constants from frontend.h and demux.h are exported by their C name and by default.

Noteworthy differences to the C API: unions and sub-structs are usually translated into flat perl hashes, i.e struct.u.qam.symbol_rate becomes $struct->{symbol_rate}.

Noteworthy limitations of this module include: no way to set the frequency or diseqc. No interface to the video, audio and net devices. If you need this functionality bug the author.