The meetings culture in most companies is far from satisfactory: a day filled with meetings with 15-30 minute breaks is very common. Even if the break is an hour or two, it’s barely enough time to focus on the task, not to mention the productive work.
Clockwise, an add-on service to Google Calendar, tries to solve these problems:
Unfortunately, it only works in Google Chrome (as an extension). It’s free for now.
Closest alternatives: Plan, Planyway.