Tcllib, the standard Tcl library, is a collection of common utility functions and modules all written in high-level Tcl.

Modules included: * aes: advanced encryption standard * amazon-s3: Amazon S3 web service interface * asn: an ASN.1 encoder and decoder * base32: a base32 encoder and decoder * base64: a base64 encoder and decoder * bee: bittorrent serialization encoder and decoder * bench: benchmark tool * bibtex: parser for bibliographies in BibTeX format * blowfish: blowfish encryption * cache: asynchronous in-memory cache * clay: clay framework * clock: date/time utilities * cmdline: a command line argument processor similar to opt * comm: remote communications facility * control: procedures for control flow structures * coroutine: coroutine utilities * counter: provides a counter facility and can compute statistics and histograms over the collected data. * crc: checksum-calculation routines (crc32, cksum, sum) * cron: automating the period callback of commands * csv: functions to handle CSV (comma-separated values) data * debug: debug messages infrastructure * defer: deferred execution * des: DES and 3DES encryption * dicttool: dictionary tools * dns: DNS and resolver library-related functions * docstrip: tools for literate programming, often used with (La)TeX * doctools: documentation tools * dtplite: lightweight doctools markup processor * fileutil: Tcl implementations of some standard Unix utilities * ftp: Tcl interface to the FTP protocol * ftpd: implementation of functions needed for an FTP server * fumagic: file utilities * generator: Tcl generator commands * gpx: GPS eXchange Format (GPX) * grammar_aycock: Aycock-Horspool-Earley parser generator for Tcl * grammar_fa: finite automaton operations and usage * grammar_me: grammar operations and usage * grammar_peg: grammar operations and usage * hook: hooks * html: generate and control HTML tags * htmlparse: parse HTML strings * http: HTTP protocol helper modules * httpd: HTTP server * httpwget: tool to download files over HTTP * ident: client interface to the ident protocol * imap4: IMAP client * inifile: parsing of Windows INI files * interp: interpreter utilities * irc: low-level IRC protocol interface * javascript: Tcl shortcuts to create common javascript functions * jpeg: functions to query and modify JPEG images * json: JSON parser * lambda: utility commands for anonymous procedures * lazyset: lazy evaluation for variables and arrays * ldap: LDAP client and extended object interface * log: functions to log messages with various facilities and levels * map: mapping utilities * mapproj: map projection routines * markdown: Markdown processor * math: Tcl math library * md4: md4 hashing functions * md5: md5 hashing functions * md5crypt: md5 based password hashing * mime: a MIME encoder and decoder * multiplexer: message multiplexing * namespacex: namespace utility commands * ncgi: a new CGI processing module * nettool: tools for networked applications * nmea: NMEA protocol implementation * nns: name service facility * nntp: Tcl functions for the NNTP protocol * ntp: functions for an NTP client * oauth: oauth API base signature * oodialect: build TclOO based DSLs * oometa: data registry service for TclOO classes * ooutil: utility commands for TclOO * otp: RFC 2289 a one-time password system * page: parser generator * pki: RSA public key encryption * pluginmgr: plugin management * png: functions to query and modify PNG images * pop3: a POP3 protocol implementation * pop3d: a POP3 server implementation * practcl: tool for integrating large modules for C API Tcl code that requires custom Tcl types and TclOO objects * processman: manage child processes * profiler: a function level Tcl source code profiler * pt: parser tools * rc4: implementation of the RC4 stream cipher * rcs: RCS low level utilities * report: provides objects which can be used to generate and format reports * rest: a framework for RESTful web services * ripemd: RIPEMD message-digest algorithm * sasl: Simple Authentication and Security Layer implementation * sha1: sha1 hashing functions * simulation: Tcl simulation tools * smtpd: implementation of functions needed for an SMTP server * snit: snit's not incr Tcl, OO system * soundex: comparison of words based on their phonetic likeness * stooop: simple Tcl-only object oriented programming scheme - provides C++/Java-like OOP interfaces * string: tokenize strings * stringprep: preparation of internationalized strings * struct: Tcl implementations of common data structures (tree, graph, etc) * tar: functions to manipulate tar files * tepam: Tcl's enhanced procedure and argument manager * term: terminal control * textutil: string manipulation library * tie: framework for creating persistent Tcl arrays * tiff: TIFF image manipulation * tool: dictionary tools * tool::datatype: dictionary tools * tool-ui: abstractions to allow Tao to express Native Tk, HTML5, and Tao-Layout interfaces * transfer: data transfer facilities * treeql: tree query language * try: trap and process errors and exceptions * udpcluster: UDP peer-to-peer cluster * uev: user events * units: convert and manipulate quantities with units * uri: functions to generate and manipulate commonly-used URIs * uuid: generator of universally unique identifiers (UUID) * valtype: validation types * virtchannel: reflected/virtual channel support * websocket: implementation of the websocket protocol * wip: word interpreter * yaml: YAML format encoder/decoder * zip: working with zip archives