Originally Posted by OneHungLo

https://www.domaintools.com/

for 100 domains and under it's free.

- Monitor domains in .com, .org, .net, .info, .biz, and .us for impending expiration or for changes in status

- Email alerts tell you when monitored domains are approaching expiration, or when other parameters such as registrar or domain status change

- Dashboard allows you to organize your monitored domains in portfolios and quickly review Whois records, availability of the domain name in other TLDs