Extrect selected entries from LDIF files like grep
ldif-extract is a small 'grep' like tool to extract and convert data from LDIF files. It could be used standalone or also in a pipe together with other tools like ldapsearch.
Search and replace operations on file content accross multiple files. Recursive operations within entire directory trees. FAR comes with support for regular expressions (regex) over multiple lines, automatic backup and various character encodings. Run grep like extractions to condense or rearrange sources, or perform bulk file renaming.
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.
binreplace is a command line tool to search and replace binary sequences in a file. It can be very powerful when used together with grep and sed. It uses prefix tree internally to search. It's efficient even with millions of search terms.
A tool which allows you to download all erotic images and videos hosted on popular image hosting sites tagged with a given tag without clicking you through the web interface. ,,java bayimg yourtag'' is enought.
glark offers grep-like searching of text files, with very powerful, complex regular expressions (e.g., "/foo\w+/ and /bar[^\d]*baz$/ within 4 lines of each other"), as well as highlighting of matches.
rtgrep is a bash script which searches for all files in the current directory or a given base directory which were created/modified within a given time period. The search can be recursive, and you can specify a pattern to be matched in the file contents