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This last point, which allows the software to be sold for money seems to go against the whole idea of free software. It is actually one of its strengths. Since the license allows free redistribution, once one person gets a copy they can distribute it themselves. They can even try to sell it. In practice, it costs essentially no money to make electronic copies of software. Supply and demand will keep the cost down. If it is convenient for a large piece of software or an aggregate of software to be distributed by some media, such as CD, the vendor is free to charge what they like. If the profit margin is too high, however, new vendors will enter the market and competition will drive the price down. As a result, you can buy a Debian release on several CDs for just a few USD.
In the GNU project, we use copyleft to protect the four freedoms legally for everyone. We believe there are important reasons why it is better to use copyleft. However, noncopylefted free software is ethical too. See Categories of Free Software for a description of how “free software,” “copylefted software” and other categories of software relate to each other.
Freeflys: Another strong contender in the freebies space, Freeflys has appeared on NBC’s Today Show, The Doctors, Fox News and a handful of other media outlets. Similar to most of these sites, Freeflys utilizes email alerts to tell users about free-sample offers as they happen. The site also allows you to search for a specific product with the handy search bar.