the interactive TeX shell WinEdt from: http://www.winedt.com/ This is actually a shareware (try-before-you-buy software) with a 31-day free trial period.
They work very nicely together and produce PDF, DVI and Postscript files from LaTeX source files
To convert Word documents to LaTeX on a Windows environment,
download Word2Tex and Tex2Word
(this is also a shareware)
XEmacs is an open source text editor for Windows freely available under the GNU Public License.
It can be downloaded from http://www.xemacs.org/
Maple related links:
Maple is a Computational Algebra System that allows the user to perform symbolic and numeric computations, visualization, experimentation and much more. The Maple Adoption Program makes available to students the latest release of Maple, Maple 9.5, at a very competitive price.
Free video-tape Maple and Matlab lessons can be accessed from any computer within the wlu.ca domain. See the Campus Update
Magma is a Computational Algebra System produced and distributed by the Computational Algebra Group within the School of Mathematics and Statistics of the University of Sydney, Australia. Magma homepage