The complete list of functions can be displayed with library(help=spider).
More information, including a tutorial on the use of spider can be found at http://spider.r-forge.r-project.org.
A few of the key functions provided by spider:
DNA barcoding:
bestCloseMatch, nearNeighbour, threshID, threshOpt.
Sliding window:
slidingWindow, slideAnalyses, slideBoxplots.
Nucleotide diagnostics:
nucDiag.
Morphological techniques:
paa.
ape-package,
pegas-package.