From :
http://www.ad-duha.org/html/copyright___terms_of_use.html#fataawa
FATWA (RELIGIOUS RULING) REGARDING COPYRIGHTS AND THE SALE OF PRODUCTS TEACHING ISLAMIC KNOWLEDGE
Some customers have contacted Ad-Duha in the past with questions regarding copyrights, particularly in reference to the sale of products teaching Islamic knowledge.
We understand the confusion that may surround this issue, therefor we have posted the decisions of the scholars (Fatwa) on these issues so that these matters can be understood based on a correct understanding of the Sharee'ah (Islamic Law).
The Fiqh Council of the Muslim World League
Makkah al-Mukarramah
The author and inventor should have rights with regard to that which they have written and invented, and this right is something that belongs to them according to Sharee'ah. It is not permissible for anyone to take it away from them without their permission...
Similarly neither the publisher with whom the author makes a deal nor anyone else has the right to change any of the books content or to change anything else without the authors consent.
The Islamic Fiqh Council in Jeddah,
belonging to the Organization of the Islamic Conference
Trade names, company names, trademarks, writings and inventions are all the copyright of their owners or authors, which in modern practice have acquired monetary value. These rights are respected by Sharee'ah and it is not permissible to transgress against them. The owner of these rights has the right to dispose of them and no one should transgress against them.
The Standing Committee for Academic Research and Issuing Fataawa
Kingdom of Saudi Arabia
It is not permissible to make copies of programs (software) whose authors have forbidden the making of copies without their permission, because the Prophet (peace and blessings of Allaah be upon him) said: "The Muslims are bound by their conditions." And he (peace and blessings of Allaah be upon him) said: "Whoever reaches a permissible thing first (i.e. the author/inventor) has more right to it."
Fatwa from Shaykh Ibn Uthaymeen (may Allaah have mercy on him)
In regard to the permissibility of breaking a copyright: If the authorities (government or international law for example) forbid that (breaking the copyright), then it is not permissible, because Allaah has enjoined us to obey those who are in authority, except it if involves disobedience to Allaah, but banning the copying of these things is not disobedience to Allaah.
Shaykh Bakr ibn Abd-Allaah Abu Zayd (may Allaah preserve him)
Fiqh al-Nawaazil, 2/101-187
There is nothing wrong with making copies of useful tapes and selling them, or making copies of books and selling them, because that is helping to spread knowledge, unless their authors have stated that this is not allowed, in which case their permission must be sought.
Islamic Fiqh Council
(concerning the sale of products containing Islamic knowledge)
Undoubtedly the authors of these tapes and CDs have expended time, effort and money to produce them, and there is nothing in Sharee'ah to indicate that they should not take the profits that result from this work. The one who transgresses against their rights is wronging them and consuming their wealth unlawfully.
Shaykh Muhammad Baazmool
Umm Al-Quraa University in Makkah
In regards to copyrighted material being posted on the internet without the authors knowledge: The answer to this is found in what I have already said, since this action of his is a kind of transgression against the intellectual property rights (copyrights) of his Muslim brother. And this action of his is similar to stealing, as this is stealing intellectual property rights (copyrights), and stealing as defined in the Sharee'ah is taking things that are valued at a quarter of a deenaar (coin, or unit money, used at the time of the prophet) or more. I say that it is upon the one who has done this action to hide this material (ie. by removing the page), seek permission from the owner, and not publish it until after this permission is obtained.
In regards to those who make derivative works based on the original without permission: And if he has taken some liberties with this material, making changes to it, and has acted with tadlees (deception), then this is a crime that he has committed against the owner of this material, and a transgression against the brother who did the work of translating the material and making footnotes to it, and has done an action that is not permissible.
And no doubt, the people of wara', the people of the Religion, the people of taqwaa are keen to do things in a way to achieve (barakah) blessings. And blessings do not come in a thing done in this manner. So if information is being taken in this manner, then it will be void of any blessing.
And it is upon all of us to work hard to teach the people these affairs. And every person should respect the rights of others, so that this kind of affair does not take place, as it is a form of transgression against the rights (of the people). Islam calls to the preservation of these kinds of rights, to uphold them, and to not transgress (against others) or commit crimes like these, and Allaah knows best. (end quote)
For the full text of these rulings and more information on this issue please see...
http://www.bakkah.net/interactive/q&a/aamb080-copyrights-translations-intellectual -property.htm
http://www.islamqa.com/en/ref/52903
http://www.islamqa.com/en/ref/81614