Alternatives to InsomniaT for all platforms with any license

Amphetamine

Amphetamine is a little app that lives in your menu bar which can effortlessly override your energy saver settings and keep your Mac awake.

Free Mac
Customizable triggers Schedule session Sits in the System Tray Add a feature

22 Like
Caffeine for Mac

Caffeine is a tiny program that puts an icon in the right side of your menu bar. Click it to prevent your Mac from automatically going to sleep, dimming the screen or...

Free Mac
Sits in the MenuBar Add a feature

89 Like
- Discontinued The program is no longer updated and seems not to work. Last version, 1.1.1, released in December 2010, can be still downloaded from the official website.
Don't Sleep

Don't Sleep is a small portable program to prevent system shutdown, Standby, Hibernate, Turn Off and Restart.

Free Windows
No features added Add a feature

10 Like
InsomniaX

It always has been a missing feature: disabling the sleep mode on a Apple Laptop. Who does not want to use it as a big juke-box or go warwalking. The best looking server...

Free Mac
Sits in the System Tray Add a feature

11 Like
- Discontinued The software is discontinued from July 2017 http://semaja2.net/2017/06/thank-you-and-farewell-for-now/
Lungo

Lungo prevents your Mac from falling asleep and your screen from dimming. This can be useful when: - Doing a presentation at work - Watching YouTube videos in...

Commercial $ $ $ Mac
Sits in the MenuBar Add a feature

2 Like
Coffee Buzz

Coffee Buzz is the easiest and safest display-sleep preventer available, with simple operation and exclusive Safety Auto-Shutoff feature. Keeping your Mac awake (and...

Free Mac
Sits in the System Tray Add a feature

1 Like
NoSleep

NoSleep makes closing of your MacBook lid possible without going to a sleep mode. Now you shouldn't have to plug your mouse and monitor to stay computer awake - just...

Free Open Source Mac
No features added Add a feature

4 Like
NoDoze

NoDoze simulates keyboard/mouse activity to keep the screensaver from activating. Its activity depends on currently running programs. You can use regular expressions or...

Free Open Source Windows
No features added Add a feature

2 Like
Should I Sleep

Annoyed by the display getting dim when you're reading or watching something? What if the computer could “see and hear” you? By using a combination of heuristic...

Commercial Mac
Face detection Motion detection Add a feature

7 Like
Sleep Preventer

Prevents your computer from going to sleep, hibernate, dim the display or start the screensaver. Application runs in the system tray when closed. New in version v1.3:...

Free Windows
Portable Sits in the System Tray Add a feature

3 Like
SleepLess

This application is used to prevent the computer from going to sleep without changing system settings can disable sleep with lid closed Safe Sleep (Hibernate) with...

Commercial Mac
Sits in the System Tray Add a feature

4 Like
Sleep No More

A tiny menu bar application, that prevents your Mac from sleeping for a set amount of time.

Free Mac
No features added Add a feature

0 Like
SleepTime

SleepTime is a light-weight app that lives on your menu bar, letting you easily set a timer to put your Mac on sleep automatically after a specified time period you...

Commercial $ $ $ Mac
No features added Add a feature

0 Like
SmartSleep

SmartSleep lets you select each sleep state. Additionally the new SmartSleep state lets your notebook just sleep while the battery has a high level. If the battery level...

Commercial Mac
No features added Add a feature

1 Like
- Discontinued Program hasn't been updated since 2013. No longer on app store.