Numerical Recipes GuideDocumentation for the Numerical recipes can be found on the web at www.nr.com.
The entire Numerical Recipes book is available online in PDF format with Fortran 90/C/C++ routines. Documentation for every routine is available in the online book. Here's the link for Fortran 90 quick reference.
The book is also available at the Stanford Engineering Libarary with a CDROM for the routines.
These Routines will be soon available on the web. For a simpler version of these routines refer this website. This website has a few basic routines that can be downloaded and used. It also has a few basic CFD codes for quick reference.