Blacklist Websites
The Spamhaus Project
Spamhaus is the world leader in supplying realtime highly accurate threat intelligence to the Internet's major networks.
Complaints Board – Complaints and Reviews
Complaints, reviews and helpful information regarding allegedly unethical companies and bad business practices. Blacklist of bad companies and goods.
URIBL.COM - Realtime URI Blacklist
URIBL.COM is a Realtime URI Blacklist (RHSBL) served via DNS to identify Unsolicitied Bulk and Commercial Email (UCE/UBE) based on the links within the email. URIBL.COM is enabled by default in the popular opensource SpamAssassin.
SelfControl
SelfControl is a free Mac app that helps you avoid distracting websites. Block your own access to websites or mail servers for a pre-set length of time.
Untangle: Network Policy at Work
Untangle, a network software and appliance company, provides the most complete multi-function firewall and Internet management application suite available
Hosts Tools Web hosting software for IIS, SMTP, Anti-Spam
Must Have Software for Web Hosting Providers. Professionally developed. Tested on a real web hosting environment.
MultiRBL.valli.org - Blacklist, Whitelist and FCrDNS check tool
Free multiple DNSBL/RBL lookup and FCrDNS check tool. Test the IP (IPv4 or IPv6) of your mailserver on more than 200 blacklists and whitelists.
IPOK - reverso, blacklist, traceroute, ping, whois, dns, netmask
Descubra seu IP. Análise de reverso, dnsreport, blacklists, dns, calculo de subrede, netmask, traceroute, whois, ping, servidor
Wysigot - browse, capture and monitor the web
Wysigot is the browser that monitors any site or any file anywhere (web, ftp, LAN, local), with powerful tools for capturing, updating, sorting, comparing, archiving, searching, showing anything new (alarms, highlighting modified texts...). Free version