If you want to post the latest articles from your blog or website on to Twitter, the FeedNest is a good option. FeedNest allows you publish any RSS feed, even if its not your own website or blog (like techcrunch, cnn, BBC, etc) to your twitter account automatically posting each new item as they are published. By this way you can reach out to your Twitter followers even if there are not subscribed to your feeds.
To add any feed to Twitter, you need to provide the feed URL and your twitter username and password, so that next time a new article is available, it will be automatically posted to Twitter.
Similar to adding new feed, you can also delete them in case you want to stop posting to Twitter. You can also track your feeds and view stats after logging into FeedNest with Twitter username and password.