Anti-social
- Blocks social networks until time expires
- customizable blocklists
- Mac, Windows app
- http://anti-social.cc/
Floodgate
- Mutes Twitter content that contains abusive, sexist or racist keywords
- https://chrome.google.com/webstore/detail/floodgate/hdclgdbenmhnphicnclpialmkpdjooaf
Freedom
- Blocks all network activity until time expires or reboot
- Mac, Windows app
- https://macfreedom.com/
Productivity Owl
- Blocks "junk" web during certain hours (ie work, sleep)
- Whitelist, blacklist and graylist (one minute per page max)
- Chrome extension
- http://www.productivityowl.com/
Social Network Sleep
- Chrome extension, turns off social sites after 10pm
- https://chrome.google.com/webstore/detail/social-network-sleep/iodgjpmcihkckbopbiadgghfmpdbmcld
App Cap
- blocks mobile apps on schedule
- review
- iOS app
Rescue Time
- Limits applications on schedule
- Logs usage analytics
- Works on mobile + desktop
- https://www.rescuetime.com/