Site Interessante !

http://www.inf.ufpr.br/nicolui/grad/ci067/Docs/NotasAula/notas.html

http://www.mtm.ufsc.br/~azeredo/cursoC/c.html

http://www.ime.usp.br/~pf/algoritmos/index.html

https://aurelianomartins.wordpress.com/

http://www.defendendoolinux.in/

http://www.numaboa.com.br/

http://www.linuxtotal.org/

https://www.khanacademy.org/intl/pt

http://www.softwarepublico.gov.br/

http://asm.sourceforge.net/ (Linux Assembly!)

http://codef00.com/

http://www.backtrackbrasil.com.br/site/

http://aurelio.net/

http://funcoeszz.net/

http://www.softwarelivre.gov.br/

http://aurelio.net/vim/

http://www.piazinho.com.br/

https://www.governoeletronico.gov.br/acoes-e-projetos/guia-livre

https://www.serpro.gov.br/downloads

http://users.telenet.be/mydotcom/library/index.htm