A command line tool for text file analyis, filtering, splitting and reporting.
Runs under Java (1.5+), supports plugins written in Groovy.
Has nix and win batch files in distributions.
GrepClipse is an easy way to filter an Eclipse console's content through a regular expression as you'll do it on a *nix console through the commands grep -n <regexpr> <currentConsoleContent> followed by tail -nf <newConsoleContent> | grep <regexpr> helping the analysis of logs during the execution of a process.
Shell.NET is a set of console and winform applications written in C#. It features nearly 100 applications ranging from classical Unix applications like basename, cal, grep, tr, uniq, and wc, to some very unique tools like RunScript or TextTransform.