Good webapp for checking availability of domain names?

Is there an web/AJAX app that enables me to check availability of domain names under all top level domains? It would be a plus if it also could recommend similar domain names or have other innovative features.

From web app grm

• Who.is can do that, just type the keyword in without the TLD.

  From Simon Brown

• I love domai.nr for this sort of thing. Doesn't search all TLD's, but checks availability and recommends similar/abbreviated names across TLD's. Not perfect, but the best I've used.

  From tsondermann

• Namechecklist.com is a tool that is launched last week which even checks the chosen name on social networks and gives feedback on how unique it is via google results.

  From PeterEysermans

• Use "Domain Lookup" on whois.net.

  From Mehper C. Palavuzlar

• I use Domize which is simple and quick, they also have a mobile version i believe.

  They have quite a variety of TLDs to search:

  

  And some interesting search options:

  

  From Marc Roberts

• I've toyed with DomainTyper before. It suggests domain "hacks" based on what you type in. It also seems to support quite a variety of TLDs.

  From Grant Palin

• I like Instant domain search. Instant results! :)

  From thunderror

• If you are looking to check for domain names on all TLDs as you say in your question, don't go past iWantMyName which searches over 80 extensions (as far as I can tell - that figure does include things like .co.uk as well though).

  If you are primarily looking for the innovative features and name suggestions, as you say in your question, then check out all of these - and apologies for the plain text, I can't insert more than one hyperlink at my current rep level :(

  • www.nameboy.com
  • www.bustaname.com
  • www.domaintyper.com (also suggested by @Grant Palin)
  • www.domai.nr (also suggested by @tsondermann, and the site I use the most for lookups)
  • www.nxdom.com
  • www.dotomator.com
  From tobeannounced

• How did no one suggest http://ajaxwhois.com? By far the best/fastest option.

  grm : Looks very good, but only support a very limited subset of domains. Although, for .comish names it's a good option. Upvote from me.

  Book 'em Danno : definitely fastest, even though least option driven. upvote
  From mike the mike

• The web app Wordoid.com is superb for name ideas, as well as checking on the availability of .com and .net domains. It lets you specify a starting word, then builds up prefixes and/or suffices around that word, checking for "naturalness" against up to 5 languages (English, Spanish, French, Italian, German). You can also specify the maximum word length. Finally, it tells you the approximate current search hits for the suggested names; for building a new brand, this can be crucial, as you'll want to zoom in on words that have few or no current search hits.

  From limist

• Have a look at http://gandi.net - their domain lookup is decent, and they don't try to upsell you like so many others.

  For brainstorming domains, http://domai.nr/ are pretty good and their site is pretty slick too.

  From Mr. Matt