Plugin to reject spam. Port from same author from http://www.phpbbantispam.com Actually visits the URL from commenter to spider for spamwords.
Give your visitors the ability to lookup US Congress members for specific zip codes and addresses.
Check Domain WHOIS Lookup for availability. Simple insert the [pwhois] shortcode on a page or post
The plugin allows a user to install a VoIP Call Charges calculator by widget or short-code.
"Postcodes4U Address Finder" lets you look up an address using a UK Postcode.
Site reorganization-proof internal linking via shortcodes, referencing page/post IDs.
Check if a visitor is listed on httpBL.abuse.ch, see http://dnsbl.abuse.ch/faq.php#about_httpbl for more information.
Add country flags anywhere in your WordPress blog using simple shortcodes and/or widgets, or show visitor country flag based on their IP address.
Easily reference a PHP function and have it displayed in a styled tooltip on hover.
This plugin allows you to add a thesaurus lookup to your sidebar, or anywhere else. Thesaurus service provided by words.bighugelabs.com.