qdapRegex is a collection of regular expression tools associated with the qdap package that may be useful outside of the context of discourse analysis. Tools include removal/extraction/replacement of abbreviations, dates, dollar amounts, email addresses, hash tags, numbers, percentages, person tags, phone numbers, times, and zip codes.
Installation
To download the development version of qdapRegex:
Download the zip ball or tar ball, decompress and run R CMD INSTALL on it, or use the devtools package to install the development version:
# install.packages("devtools")
library(devtools)
install_github("trinker/qdapRegex")
Note: Windows users need Rtools and devtools to install this way.
TRinker's R Blog 