String Utility Functions - various string-related functions.
Character Set Conversion - convert strings between different character sets using iconv().
Unicode Manipulation - functions operating on Unicode characters and UTF-8 strings.
Base64 Encoding - encodes and decodes data in Base64 format
Internationalization - gettext support macros.
Date and Time Functions - calendrical calculations and miscellaneous time stuff.
Random Numbers - pseudo-random number generator.
Hook Functions - support for manipulating lists of hook functions.
Miscellaneous Utility Functions - a selection of portable utility functions.
Lexical Scanner - a general purpose lexical scanner.
Automatic String Completion - support for automatic completion using a group of target strings.
Timers - keep track of elapsed time.
Spawning Processes - process launching with fork()/exec().
File Utilities - various file-related functions.
Shell-related Utilities - shell-like commandline handling.
Commandline option parser - parses commandline options
Glob-style pattern matching - matches strings against patterns containing '*' (wildcard) and '?' (joker).
Simple XML Subset Parser - parses a subset of XML.
Key-value file parser - parses .ini-like config files
Bookmark file parser - parses files containing bookmarks
Windows Compatibility Functions - UNIX emulation on Windows.