Update 2022: Flock doesn’t exist anymore. Use some other alternative instead.
Flock is a free website to follow Twitter users of a particular field in bulk. The website lets you follow large number of Twitter users in a click of a button. All you need to do is sign up with the website using your Twitter account. Then you can select one of the premade lists to follow or you can even create your own list. There are various lists which you can follow like Y Combinator, Startups, Product Hunt Team, Fashion Industry, Apple Experts, GOP Leaders, WordPress, etc. You can follow people belonging to a particular field in bulk using this website easily.
The interface of the website home page is shown below.
Go ahead and login to the website using your Twitter ID. The website will ask you for authorization. After this you can go ahead and browse the already existing lists and follow some of them.
As we know that Twitter doesn’t allow sending bulk follow requests and if they suspect you doing that they can suspend or block your account. To take care of this situation, the bulk follow requests from your account are sent after short intervals of time, so that Twitter doesn’t suspect you of foul play.
You can also create a list of your own. Click on the create list button, which will redirect you to the page shown in the screenshot below.
Here you would be required to enter a name for your list. If you want to import a list from Twitter, then you would need to copy and paste the URL of the Twitter list you want to import. Otherwise, add people to your list by searching with their names, or Twitter handles. You would need at least 5 people to start a list and there can be 250 people maximum in a list. Below is a screenshot of a list that I made.
On the homepage of this website there are lots of lists which can be followed. You can click on the name of a list and a interface like the one shown in the screenshot below will open up.
Here you can see the name of the person who created this list on the top. Below this you will see two numbers, first number is for the number of people following this list and the second number is the number of people in this list. On the left side are the names of the people in this list. And on the right side are the latest tweets by the people in this list.
Check out another free software for deleting old tweets in bulk.
The website works well to follow users of a particular field in bulk on Twitter. Just select your field of interest and follow popular accounts in that field in bulk using one of the lists on this website.