xMarkup is a command line and GUI utility for multipurpose processing of a set of text files. It can be used to generate or edit the navigational cross-references within a set of HTML documents, analyze and convert the structure or content of SGML, XML, HTML, or text documents, split or merge text files with specified rules, analyze and extract data, generate scripts, and more. xMarkup supports a built-in procedural language which may be used to describe rules of the processing. This language is a simple dialect of the Icon programming language.
Yasma (Yet Another Sendmail Logfile Analyzer) is a reporting tool for sendmail log files. It provides a nice overview of your mail traffic like: messages transferred, some average values, top lists of messages sent, received, rejected, etc., and top lists of supposed spammers, status messages, relay hosts, and mailers. It analyzes one or more log files from the command line and writes an HTML report. For security, it can hide the user part of mail addresses listed in the report. A GeoIP database can be used to show country information.