Presentation of the gnu.* hierarchy, which is a collection of newsgroups about the Free Software Foundation's GNU Project. Most of these newsgroups correspond to GNU mailing lists.
Collection of routines for numerical computing written in ANSI C and present a modern Applications Programming Interface (API) for C programmers, while allowing wrappers to be written for very high level languages.
Object-oriented extension to Guile; very close in spirit to Common Lisp Object System, CLOS (CLtL2), but adapted for Scheme language; gives full OO system with multiple inheritance, generic functions with multi-method dispatch.