REDUCE includes a wide variety of specialized packages that are included with the standard release and documented online. Some additional packages that use REDUCE are also available directly from their authors. These include:

DIMSYM

Symmetry determination and linear differential equation package
Author: James Sherring
 

Emacs Mode for REDUCE

A major GNU Emacs editing mode for REDUCE files and sessions
Author: Francis J.Wright
 

GRG 3.2

A package for making calculation in differential geometry and field theory as simple and natural as possible
Author: Vadim V. Zhytnikov

REDTEN

Tensor manipulation package
Authors: John Harper and Charles Dyer
 

SCOPE 1.5

Source Code Optimization package
Author: Hans van Hulzen

Some packages may also be accessed by sending inputs to the authors' servers, namely;

CONVODE
           Package for solving various systems of differential equations
           Author:  Alain Moussiaux

Holistic Discretisation of dynamical partial differential equations
          Author: A.J. Roberts