ProcessAlive

ProcessAlive is a lightweight and portable piece of software that can be configured to automatically restart particular processes when they are stopped by Windows for various reasons.
It's practical for scenarios when there are important programs running in the background which frequently crash, since it may be difficult to keep track of them. Otherwise, you can set applications to run continuously until manually halted.

No setup required, besides .NET Framework

The whole program is wrapped in a single executable file which you can save to any part of the hard drive or copy to a USB flash drive, in order to run it on any computer. However, you must have .NET Framework installed. It doesn't make any changes in the Windows registry or create extra files on the HDD without your permission.

Keep programs alive

It's packed in a user-friendly interface represented by a normal window with a well-structured layout, where you can add as many applications as you want to the list by indicating their .exe via a file browser.
The monitoring procedure can be started with one click, after which ProcessAlive can be minimized to the systray to make it non-intrusive. It's also possible to remove any program's entry from the list if you change your mind, save the list to a plain text document, as well as integrate the tool into the Windows autostart sequence, in order to run it by default every time you boot your computer. This option can be later disabled.

Evaluation and conclusion

There were no stability issues in our tests, thanks to the fact that the software utility didn't hang, crash or prompt error messages. It had minimal impact on the computer's performance, running on low CPU and RAM.
To conclude, ProcessAlive facilitates a simple platform for continuously running programs.