The Pipe Magic Tools (PMT) are a small collection of filters which can be added to UNIX pipes. The filters include: speed Measures the speed of the data flowing through the pipe throttle Controls the speed of the data flowing through the pipe rot13 The famous rot13 algorithm rot47 The not-so-famous rot47 algorithm tolower Converts all alphabetic characters to lower case toupper Converts all alphabetic characters to upper case WWW: http://hansmi.ch/software/pipe-magic-tools