Is installing software using serial numbers available in internet haram or halal? E.g. operating systems, Photoshop and office applications. I'm not selling things using the software, but I make websites and graphics and sell them. Even I do classes.
It is very wrong to use softwares which others make for years in programing, designing, planing and testing that they charge for their living. This is the lone source of income for a programmer.
It is same as : If you make a shop for selling ice-creams and people come there and take their ice-creams for free. How you feel about that?
However, if a software is open source you can use that for free although requiring Key. You are permitted by Laws to download that on Internet.
If there is an agreement between you (your company, your city, your country) and the manufacturer you must not use it even though there are not Muslims. Take a look at this for more information (Persian).