You are aware of CGI.pm I presume.

After a review of the free standard modules, what functionality
do you miss??? 

Here is a list of web related free modules that come with 
the *standard* distribution of perl. Sincere apologies to 
the hundred of authors of thousands of modules not 
explicitly mentioned. For details see http://www.CPAN.org

NB: CPAN is the Comprehensive Perl Archive Network.

tachyon

   Benchmark
   Bundle
     DBD
         CSV
         mysql
     DBI
     LWP
   Business
     CreditCard
   Carp
   CGI
     Apache
     Carp
     Cookie
     Fast
     Imagemap
     Pretty
     Push
     Screen
     Switch
     XMLForm
   Chart
   Class
   Compress
     Zlib
   Config
   CPAN
   Crypt
   Date
     Calc
     Format
     Manip
     Parse
   DB
   DBD
     ADO
     CSV
     DB2
     dbd-sybase
     File
     Multiplex
     mysql
     ODBC
     Oracle
     Proxy
     Sybase
   DBI
     DBD
     FAQ
     Format
     ProxyServer
     Shell
     W32ODBC
   DB_File
   Digest
   DirHandle
   Fatal
   Fcntl
   File
     Basename
     CheckTree
     Compare
     Copy
     CounterFile
     DosGlob
     Find
     Glob
     Listing
     Path
     Recurse
     Slurp
     Spec
         Functions
         Mac
         OS2
         Unix
         VMS
         Win32
     stat
     Tools
   FileCache
   FileHandle
   Filter
     cpp
     decrypt
     exec
     sh
     tee
     Util
         Call
         Exec
   FindBin
   Font
     AFM
   Graph
     Kruskal
   HTML
     AsSubs
     Element
     Entities
     Filter
     Form
     FormatPS
     Formatter
     FormatText
     HeadParser
     LinkExtor
     Parse
     Parser
     Stream
     Template
     TokeParser
     TreeBuilder
   HTTP
     Cookies
     Daemon
     Date
     Headers
         Util
     Message
     Negotiate
     Request
         Common
     Response
     Status
   I18N
   Image
     Size
   IO
     AtomicFile
     Dir
     File
     Handle
     Lines
     Pipe
     Poll
     Scalar
     ScalarArray
     Seekable
     Select
     Socket
         INET
         UNIX
     Stringy
     Wrap
     WrapTie
   IPC
   Locale
     Country
     Language
   LWP
     Debug
     MediaTypes
     MemberMixin
     Protocol
     RobotUA
     Simple
     UserAgent
   Mail
     POP3Client
   Math
   MD5
   MIME
     Base64
     Lite
     QuotedPrint
   MLDBM
   Mysql
   NDBM_File
   Net
     Bind
         Resolv
         Utils
     Cmd
     DNS
         Header
         Packet
         Question
         Resolver
         RR
             A
             AAAA
             AFSDB
             CNAME
             EID
             HINFO
             ISDN
             LOC
             MB
             MG
             MINFO
             MR
             MX
             NAPTR
             NIMLOC
             NS
             NSAP
             NULL
             PTR
             PX
             RP
             RT
             SOA
             SRV
             TXT
             X25
         Update
     Domain
     DummyInetd
     FTP
     hostent
     LDAP
         BER
         Constant
         Entry
         FAQ
         Filter
         LDIF
         Message
         Reference
         Schema
         Search
         Util
     netent
     Netrc
     NNTP
     PH
     Ping
     POP3
     protoent
     servent
     SMTP
     SNPP
     Telnet
     Time
     Whois
   Netscape
     History
     HistoryURL
   News
     Newsrc
     NNTPClient
   POE
   POSIX
   PPM
     SOAPClient
     SOAPServer
   SGMLS
     Output
     Refs
   SHA
   Shell
   SOAP
     Defs
     Envelope
     EnvelopeMaker
     GenericHashSerializer
     GenericInputStream
     GenericScalarSerializer
     OutputStream
     Packager
     Parser
         HTTP
             Apache
             CGI
             Client
             Server
     TypeMapper
   Socket
   Sort
     PolySort
   SQL
     Eval
     Statement
   Statistics
   Storable
   String
   Sybase
     BCP
   Symbol
   Sys
     Hostname
     Syslog
   Test
     Harness
   Text
     Abbrev
     CSV_XS
     German
     Metaphone
     ParseWords
     Soundex
     Striphigh
     Tabs
     Template
     Vpp
     Wrap
   Thread
     Queue
     Semaphore
     Signal
     Specific
   Tie
   Time
     gmtime
     HiRes
     Local
     localtime
     Period
     tm
     Zone
   Tk
   User
   Win32
   Win32API
   WWW
     RobotRules
         AnyDBM_File
     Search
         AltaVista
             AdvancedNews
             AdvancedWeb
             Careers
             Intranet
             News
             Web
             Classifieds
                 Employment
         Crawler
         Dice
         EuroSeek
         Excite
             News
         ExciteForWebServers
         Fireball
         FolioViews
         Google
         Gopher
         GoTo
         HeadHunter
         HotFiles
         Infoseek
             Companies
             Email
             News
             Web
         Livelink
         LookSmart
         Lycos
             Pages
             Sites
         MetaCrawler
         Metapedia
         Monster
         MSIndexServer
         NetFind
         NorthernLight
         Null
         PLweb
         Search97
         SFgate
         Simple
         Snap
         Test
         Verity
         VoilaFr
         WebCrawler
             Classifieds
                 Employment
         ZDNet
     SearchResult
   XML
     DOM
     Element
     Parser
         Expat
     PPD
     PPMConfig
     ValidatingElement