if you want only .com, org, info, and some other domain whois, just search at google, lot of site there, but they not show up country based domain whois (like .co.uk, .com.au, .id, .ie .pk, .eu, .es .co.za, .co.il etc)
you can try for whois record namebrite . com, whois .com, whoismind .com and many other site.
whoisology is good for outdated domain (past domain owner) and current register domain history (if he have record in data base)