Program or application used for screenshots

[Marius]

I kept seeing this kind of screenshots on this site. 

Please, can someone tell me what program or application is used to put this red arrow?

[Nathan Explosion]

Windows Snipping Tool

Lightshot

[Jim M]

I responded to you in the other topic:

 

[DawPi]

Also Snagit. I've been using it for years.

[Sonya*]

My vote for Nimbus. Cannot live without anymore.

[Daniel F]

I‘m using https://cleanshot.com on the Mac. 

[Marc]

Another for snagit 🙂