When it's not possible to change the screensaver settings in your Windows environment, then it's almost impossible to show things on your screen for a longer period without activating the screensaver.
Theine Alternatives
Theine is described as 'Prevent your Mac from falling asleep, dimming your screen or starting the screensaver. Theine keeps macOS awake just like caffeine does with you' and is a prevent sleep mode app in the os & utilities category. There are more than 25 alternatives to Theine for a variety of platforms, including Mac, Windows, Android, Linux and Flathub apps. The best Theine alternative is Amphetamine, which is free. Other great apps like Theine are Caffeine for Windows, Stimulator, Caffeine for Linux and PowerToys - Awake.
Alternatives list
Coffee allows you to keep the display awake without having to change the device settings. It can be toggled at various places:
Cost / License
- Free
- Open Source (Apache-2.0)
Platforms
- Android
- F-Droid

- 34 Sleep Preventer alternatives
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: -Parameter support. v1.2: Option to let display fall asleep. v1.1: Sleep timer.




@home is a tiny convenience utility, that knows when you are at home (based on your wireless network name) and prevents your computer from locking the screen. When you are away from home, your normal locking idle times apply.

- 24 InsomniaT alternatives
This is a kernel extension and clients that allow the MacBook to disable sleeping when the lid is closed. MOUNTAIN LION IS NOT SUPPORTED
Simulates activity (=> disables screensaver and powersaving) while running programms (any .exe) from a choosen directory. Main purpose is to choose the steam directory to disable monitor powersaving while running steam games.

Keep your screen on when your device is running your GPS application, favorite remote control, playing a movie or slideshow, etc... Perfect to keep your screen on without dimming for application development. Your screen will never go back to sleep until you want it to...



This application is used to prevent the computer from going to sleep without changing system settings
This app will keep your system awake for a defined period of time. It will pause the energy settings and prevent the screensaver from starting.



Anti-Sleep App for your Mac.
Caffeinated prevents your Mac from going to sleep, dimming your screen or starting the screensaver.


+2
Espresso is a Caffeine alternative with support for retina displays and the black or white menu bar introduced in OS X Yosemite.





































