Actually there are only five that I know off (so they’re all top!) and one homescreen plugin, but I thought the title makes it sound nice ;)

#1: TinyTwitter (http://www.tinytwitter.com/)

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Features: Very functional, GPS,  quick.


#2: Pocketwit (http://code.google.com/p/pocketwit/)

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Features: Very pretty, GPS, Maps support, URL shortening, twitpic, search.twitter, themes

#3: Twobile (http://www.infinitumsoftware.com/twobile)

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Features: Twitpic, GPS, URL shortening

#4: CETwit (http://www.kosertech.com/blog/?page_id=5)

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Features: Twitpic, GPS, URL shortening, retweet, skweezer, ping.fm

#5: Twitula (http://cid-eda3c1275909727a.skydrive.live.com/self.aspx/Public/MobileApps/Twitula35.CAB)

Features: functional, better UI

#6: Twit Today (http://dalelane.co.uk/page.php?id=1047)

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Features: homescreen plugin

there you go, what do you think? Gimme feedback @lokeuei