GNU sed - sed (stream editor) is a Unix utility that parses text and implements a programming language which...
TextPipe - Search and Replace, Find and Replace, Web Sites, Database Extracts, XML, CSV, Tab, mainframe COBOL data and more
TXR - Pragmatic, convenient data munging language.
WordCounter.net - Count words, sentences, paragraphs etc.
SNR (Search-n-Replace) - SNR is a free Windows command-line utility that performs multiple string-replacement operations on a data file in a single pass.
NimbleText - NimbleText is a text manipulation and code generation tool available online or as a free download.