Hootsuite is a really good and professional twitter client to manage your twitter account online in your browser from any computer.
The best part of hootsuite is it allows you to manage multiple twitter account with impressive ease.

Tweet, reply, Retweet and DM are all organized well above each tweet.
It makes a lot of sense to use hootsuite even if you have just a single twitter account mainly because it allows you to create columns to display tweets of customized words.

Twitters retweet is real #fail so if you are a person who loves retweeting stuff and managing account in your browser hootsuit is for you .
Other feature of hootsuite include queuing of tweets to tweet on a later scheduled time and auto shortening of links.

So if you have still not used hootsuite, it definitely is worth giving a try and its free too