Coding standards relate to software quality. Here are some widely used coding standards:
http://www.codingstandard.com for C++ by Programming Research, a free PDF (300KB, 75 pages)
http://www.misra-c2.com/ for C by MISRA (not free), for the automotive industry, rigid, many rules
http://www.knosof.co.uk/misracom.html with comments on MISRA-C, this site also has a free PDF with the new C standard
http://www.quantum-leaps.com/resources/QL_coding_standard.pdf with the Quantum Leap C coding standard (free PDF, 14 pages), practical and down-to-earth
. . . . . Ir.S.S.R. Kwee Computer Consultancy