Helpful R & GIS Links:

Tutorials and Examples:
http://www.luchsinger-mathematics.ch/Bashir.pdf
http://www.sr.bham.ac.uk/~ajrs/R/r-getting_started.html
http://www.stamats.de/InstallationUndErsteSchritteMitR.pdf (German)
´http://www.ufz.de/data/deutschstatswork_230220117649.pdf (German)
http://msenux.redwoods.edu/math/R/ImportingData.php
http://www.cyclismo.org/tutorial/R/
http://www.mayin.org/ajayshah/KB/R/index.html
http://de.wikibooks.org/wiki/GNU R:_help
http://rtutorialseries.blogspot.com/
http://www.r-bloggers.com/
http://www.statmethods.net/about/books.html
http://www.r-statistics.com/
http://cran.r-project.org/web/packages/DAAG/index.html
http://cc.oulu.fi/~jarioksa/opetus/metodi/vegantutor.pdf
http://ecology.msu.montana.edu/labdsv/
http://www.umass.edu/landeco/teaching/ecodata/labs/ecodata_labs.html

RegEx:
http://biostat.mc.vanderbilt.edu/wiki/pub/Main/SvetlanaEdenRFiles/regExprTalk.pdf

Decision Tree for Statistical Tests:
StatXact: Guide to Procedures

Spatial Analysis:
http://www.spatialanalysisonline.com/output/
http://spatial-analyst.net/book/download
http://casoilresource.lawr.ucdavis.edu/drupal/node/905
http://pvanb.wordpress.com/
http://spatial-analyst.net/wiki/index.php?title=Main_Page
http://www.r-bloggers.com/RUG/2011/12/spatial-data-with-r/
http://www.r-marburg.de/

R as GIS, cool tutorials by Rodriguez Sanchez:
https://sites.google.com/site/rodriguezsanchezf/news/usingrasagis

Ecological Models:
http://www.math.mcmaster.ca/~bolker/emdbook/index.html

R Graphs:
http://addictedtor.free.fr/graphiques/allgraph.php?sort=time
http://lmdvr.r-forge.r-project.org/figures/figures.html (Lattice)

GIS:
http://www.nceas.ucsb.edu/scicomp/recipes/gdal-reproject