GNU info on the following topics is available here:

• g77: The GNU Fortran compiler.
• gcc: The GNU Compiler Collection.
• gccinstall: Installing the GNU Compiler Collection.
• gccint: Internals of the GNU Compiler Collection.
• Gcj: Ahead-of-time compiler for the Java language
• gfortran: The GNU Fortran 95 Compiler.
• ginac-examples
• ginac: C++ library for symbolic computation.
• gmp: (gmp). GNU Multiple Precision Arithmetic Library.
• GNUPLOT: An Interactive Plotting Program
• Gri: Programming language for scientific illustration
• gsl-ref: GNU Scientific Library - Reference
• libcdio: Compact Disc Input and Control Library.
• libmatheval
• Maxima: A computer algebra system.
• Octave: Interactive language for numerical computations.
• Plotting utilities: (plotutils). GNU plotting utilities.
  graph: (plotutils)graph Invocation. Plot datasets, possibly in real time.
  plot: (plotutils)plot Invocation. Convert and display plot files.
  pic2plot: (plotutils)pic2plot Invocation. Convert files in the pic language ...
• vcd-info: Video CD dump tool
• VCDImager: GNU Video CD imaging utilities
  vcdimager: (vcdimager)vcdimager. Video CD simple formatter
  vcd-info: (vcdimager)vcd-info. Video CD diagnostic tool
  cdxa2mpeg: (vcdimager)cdxa2mpeg. Strip RIFF/CD-XA container ...
• vcdxrip: Video CD Ripping tool