Free software, as defined by the Free Software Foundation, is software which can be used, copied, studied, modified and redistributed without restriction. Freedom from such restrictions is central to the concept, with the opposite of free software being proprietary software and not software which is sold for profit, commercial software. The usual way for software to be distributed as free software is for the software to be accompanied by a free software license (or be in the public domain), and the source code of the software to be made available (for a compiled language).
Usage
To help distinguish
libre (freedom) software from
gratis (zero price) software,
Richard Stallman, founder of the
free software movement, developed the following explanation: "Free software is a matter of liberty not price. To understand the concept, you should think of 'free' as in '
free speech', not as in '
free beer'". More specifically, free software means that
computer users have the freedom to cooperate with whom they choose, and to control the software they use. The
GNU Manifesto contains language that gives evidence of Stallman's initial confusion with the usage.
Most free software is distributed online without charge, or off-line at the marginal cost of distribution, but this is not required, and people may sell copies for any price. The capitalized term "Open source" is attached to a definition originally created in 1998 from Debian's free software guidelines. While most open source software is also free software and vice-versa, this is not always the case.
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Commercial Software :: Plasma
Software :: Physics
Free Software - Twitter SearchDerrick Van Dyke is giving away his list-building software for free at http://TwitterListBuilder.com/ftb10ftb10 (Firoza Bhamgara) Mon, 04 Jan 2010 08:00:40 -0000
Derrick Van Dyke is giving away his list-building software for free at http://TwitterListBuilder.com/ftb10
Gadgets: Photo scanner is software-free, easy to use - Fort Worth Star Telegram http://bit.ly/6bhjmIclev3r (clev3r) Mon, 04 Jan 2010 08:00:09 -0000
Gadgets: Photo scanner is software-free, easy to use - Fort Worth Star Telegram http://bit.ly/6bhjmI
Free Parental Controls software/ Download it instantly!
http://www.paretologic.com/products/pgsurfer/index.aspxPGSURFER (Elton Pereira) Mon, 04 Jan 2010 07:58:55 -0000
Free Parental Controls software/ Download it instantly!
http://www.paretologic.com/products/pgsurfer/index.aspx
Free Twitter "follower adder" Software.. http://www.twitteringfortraffic.com/istvan_somodiTom_Strebbot (Tom Strebbot) Mon, 04 Jan 2010 07:57:07 -0000
Free Twitter "follower adder" Software.. http://www.twitteringfortraffic.com/istvan_somodi
Top Rated PC Optimization Software. Free Scan & Repair 100% Guaranteed! Repair Error, Clean PC, 5 Stars! http://twitthis.com/hjosb4IEAffiliate (Mike Vargas) Mon, 04 Jan 2010 07:53:02 -0000
Top Rated PC Optimization Software. Free Scan & Repair 100% Guaranteed! Repair Error, Clean PC, 5 Stars! http://twitthis.com/hjosb4
RT @asyafrudin: Open source software is not FREE. We still have to think about costs for implementation and maintenance. #opensourceFeHa (FeHa) Mon, 04 Jan 2010 07:51:26 -0000
RT @asyafrudin: Open source software is not FREE. We still have to think about costs for implementation and maintenance. #opensource
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Cloudy and Associates, Photoionization Simulations - Documentation and Files for Cloudy.
ES1, XES1, XEM1, SPAM, IBC, PDP1, PDC1, PDS1 and XPDP2 - Many particle plasma codes for bounded plasmas, PIC computer experiments with Monte Carlo collisions. All for desktop computing and complete with graphics. Downloadable via anonymous ftp. Developed at the Plasma Theory and Simulation Group, University of California at Berkeley, US.
Free Software for Atomic and Plasma Physics - URL From: Plasma Laboratory of Weizmann Institute of Science, Israel.
Hybrid Plasma Equipment Model - Software developed at the University of Illinois for numerical simulation of inductively coupled reactive ion etching reactors.
R.D.Cowan's RCN code - WWW interface to the widely used atomic structure package written by Robert D. Cowan from LANL. URL From: Plasma Laboratory of Weizmann Institute of Science, Israel.