Are you getting submerged by the number of tweets to manage? Are you looking for something more than just tweeting and retweeting? Here are the 10 best Twitter tools that can take your Twitter engagement to the next level.
Hootsuite
Hootsuite is one of the best free Twitter clients. It lets you manage multiple Twitter and Facebook accounts from a single window. You can group your feeds into separate tabs based on who is Tweeting (clients, social media geeks, journalists) or the topic that is being tweeted (#startups, #political) etc. For paid accounts, it provides more detailed analytics and also allows your accounts to be managed by multiple people.
Buffer
Do you find a lot of content in a short time and don’t want to post it all in quick succession? Buffer is the app for you. Each day, you can spend some time collecting relevant content for your followers, and then let the app schedule the tweets throughout the day. Thus, when you are at the meeting or driving, the app is still working for you and engaging your followers. 
Vizify Tweetsheet
Do yo want to visualize your tweets and understand your geographic impact? Vizify can create an infographic based on your tweets and help you fine-tune your campaigns.
Manage Flitter
After you have started following a few 100 people, it gets really hard to track the feeds. How do you manage your network and remove the unwanted connections? Manage Flitter helps you find the dud connections (based on how active they are, whether they are following you back, their profiles, and whether they post a lot in languages other than English) that could help you unfollow them. It can also help you identify which of your followers are high profile guys (based on the number of their followers) so that you don’t miss out on important connections. 
Twitter feed
Do you have a blog and want to automatically post the links to your latest blog posts on Twitter and Facebook? Twitter feed is the app for you. It lets you automate some of your interactions and makes you more productive. 
Klout
Do you want to know how you are faring in your Twitter activities? Klout app can help you. It analyzes your interactions and gives a score out of 100 that measures how actively you are engaging your audience. Klout also helps find influences in a given topic and understand the style of a given user (whether they are original content creators or curators).
Listorious
Want to find interesting people to follow on Twitter? Listorious can help you. This app has more than 2 million top users grouped into various categories. For a given topic, you can see the popular users to follow, the trending topics and some lists to track.
Twylah
One of the biggest disadvantages of Twitter is that your tweets have a very short lifespan. If your followers don’t see it in a few minutes, it is gone (submerged under a pile of other tweets). Twylah helps solve that problem by helping you create a branded magazine that automatically groups your tweets into various categories. Now, your followers have to just follow your Twylah profile to get a rich reading experience built up on your tweets.
TweetChat
Twitter’s hashtags allow you to do more than just tweeting. It can help create virtual conferences. The conference participants can choose a unique hashtag and can start using them in their regular tweets. Then, TweetChat app groups all the tweets from the and create a very interactive Twitter conference for you.
Twitalyzer
If you are managing a campaign, you would want to understand the profiles of people following you. Twitalyzer does the job for you. For a given Twitter account, it shows the kind of people whom they interact with the most, the social media scores, relationships, topics and more. This can be used for both filtering the people you want to follow and tracking your campaigns.
I believe many are still not tapping the full power of Twitter as they get discouraged by the number of messages they see at Twitter website. Once people start using the right tools, it can be a very addictive & a valuable platform.