Doki Doki Salvation is a Doki Doki Literature Club mod where MC decides to check on Sayori the night before the festival, and walks in on her about to hang herself. He talks her out of it. The mod revolves around MC helping all the girls deal with their various problems... except Monika. Monika has lost her ability to tamper with the game and is not happy about it.
The mod is mostly linear, and focuses on Sayori, but it's fair to all the girls. It ends with Monika confessing to everyone, and a really believeable and emotionally powerful scene around it. Assuming you choose to forgive Monika, the game delivers the happy ending it promised.
The mod is definitely good. Despite that, I have two major criticisms, both moral/philosophical:
The scene where everyone is trying to carpool and having trouble fitting and Sayori makes a crude and incredibly insulting comment about the size of Yuri's butt. Sayori would never intentionally embarrass someone like that. While it may be true that she is seriously lacking in social tact (as evidenced by her similar remark during her first exclsuive scene in the original game), even she would know how bad that would make Yuri feel.
It's mentioned that Sayori ends up taking medication for her depression, and that it's been helping. This is unfortunate because, when you know what I do, you know that medication can never directly affect a person's emotions. The mod is therefore contributing to a false and potentially harmful idea that people have. But if you've read my arguments in the linked article, you're already either convinced of the same thing I am and the mod won't shake your faith, or you're too irrational to be convinced by reason alone, in which case there's not much I can do to help you.