BrowseControl is described as 'agent-based web filter that blocks websites based on URLs and categories. Internet use quotas can be set based on schedules and timers. Includes a port filter and Windows application blocker' and is an app in the Security & Privacy category. There are more than 25 alternatives to BrowseControl for a variety of platforms, including Windows, Mac, Android, Linux and Google Chrome. The best alternative is Cold Turkey, which is free. Other great apps like BrowseControl are FocusMe (Paid), StayFocusd (Free), Qustodio (Paid) and SelfControl (Free, Open Source).
SelfControl is a free and open-source application for Mac OS X that lets you block your own access to distracting websites, your mail servers, or anything else on the Internet. Just set a period of time to block for, add sites to your blacklist, and click "Start.
SafeDNS provides sophisticated cloud-based and software solutions for web content filtering which increase users' safety online by blocking botnets, malware and phishing resources, filter out most advertising and content users consider inappropriate.
e2guardian is an Open Source web content filter, It filters the actual content of pages based on many methods including phrase matching, request header and URL filtering, etc. It does not purely filter based on a banned list of sites.
Focus is a Mac app that blocks distracting websites (like Facebook and Reddit) and applications, so you can improve your productivity. It has lots of awesome features like scheduling, showing motivational quotes on blocked pages, whitelisting and pomodoro support.