Clipping just the distributions from a CPAN search,
cpan> i /Proxy/
Distribution A/AT/ATRAK/Net-ProxyMod-0.03.tgz
Distribution B/BO/BOOK/HTTP-Proxy-0.13.tar.gz
Distribution C/CG/CGILMORE/Apache-ProxyRewrite-0.17.tar.gz
Distribution C/CL/CLINTDW/Apache-ReverseProxy-0.06.tar.gz
Distribution D/DC/DCASTRO/Apache-FilteringProxy-0.1.tar.gz
Distribution D/DH/DHUDES/HTTP-CheckProxy-0.4.tar.gz
Distribution D/DY/DYACOB/SOAP-Lite-SmartProxy-0.11.tar.gz
Distribution F/FL/FLUFFY/Tie-Proxy-Hash-1.01.tar.gz
Distribution H/HA/HAGANK/Apache-RewritingProxy-0.4.tar.gz
Distribution H/HA/HAGANK/Apache-RewritingProxy-0.7.tar.gz
Distribution J/JB/JBODNAR/Apache-ProxyStuff-0.10.tar.gz
Distribution K/KO/KOBAYASI/Apache-DoCoMoProxy-0.01.tar.gz
Distribution M/MI/MIYAGAWA/Apache-ACEProxy-0.04.tar.gz
Distribution M/MI/MIYAGAWA/Apache-No404Proxy-0.05.tar.gz
Distribution M/MJ/MJS/Apache-ProxyPass-0.06.tar.gz
Distribution M/MU/MUENALAN/Class-Proxy-0.01.02.tar.gz
Distribution M/MU/MUENALAN/Class-Proxy-0.01.04.tar.gz
Distribution N/NK/NKUITSE/Class-Proxy-Lite-1.00.tar.gz
Distribution P/PS/PSTADT/Apache-ProxyScan-0.31.tar.gz
Distribution Q/QJ/QJZHOU/LWP-UserAgent-ProxyAny-1.01.tar.gz
Distribution Q/QM/QMACRO/Jabber-Component-Proxy-0.02.tar.gz
Distribution R/RE/REATMON/HTTP-ProxyAutoConfig-0.1.tar.gz
Distribution T/TH/THOM/HTTP-ProxyCheck-1.1.tar.gz
Distribution T/TO/TOMC/scripts/CS-Talk/source/web/Proxy/HTML.pm.gz
Distribution U/UD/UDASSIN/HTTP-ProxySelector-0.02.tar.gz
Distribution X/XF/XFIRE/Apache-Proxy-0.02.tar.gz
...
cpan>
Proxy will get you the equivalent search over the CPAN website.
LWP is also a distribution of modules.