Packt Publishing
Интересное издательство, работающее с 2004 года, издающее книжки преимущественно по open source проектам.
Packt believes in Open Source. When we sell a book written on an Open Source project, we pay a royalty directly to that project. As a result of purchasing one of our Open Source books, Packt will have given some of the money received to the Open Source project.
In the long term, we see ourselves and yourselves, as customers and readers of our books, as part of the Open Source ecosystem, providing sustainable revenue for the projects we publish on. Our aim at Packt is to establish publishing royalties as an essential part of the service and support business model that sustains Open Source.
Интересно, что в отличие от O'Reilly, с их заумной сдачей книг в аренду через систему Safari, Packt продает PDF без DRM, -- просто пароль и надпись на каждой странице книги.