If you're looking for anime similar to How NOT to Summon a Demon Lord, you might like these titles.
On the night of his favorite game’s shutdown, Akira Oono awakens in the body of his online character: Demon Lord Hakuto Kunai. He’s not the most confident guy ever, and he’s traveling with an injured young girl. But with powerful game mechanics and abilities on his side, this gamer turned badass plots his course through a diverse new world filled with saints, demons, and charming companions!
There was once a hero who was summoned to another world, and he saved that world. However, the man was caught in a "trap" and was forcibly returned to his original world. On top of that, he had to start over as a baby… This is the story of a crazy journey in another world where a former hero who was reincarnated into a slightly gloomy high school student is "resummoned" back to that same world! There's a lot of room to work with when it's the second time, huh♪
When ordinary high school student Usato happens to bump into student council president Suzune and classmate Kazuki on his way home. All three are suddenly swallowed up by a magic circle and transported to another world. The trio are summoned as heroes to save a kingdom from a demon king's army — but, only Suzune and Kazuki have what it takes to be heroes. Usato just happened to be dragged along for the ride. However, things turns around when Usato is discovered to have the rare knowledge of a healing mage. He is abducted by a woman who identifies herself as Rose, the leader of the life-saving corps, and drafted into her ranks.
Seiichi Hiiragi is at the bottom of his school's social pecking order, but one day, he and his entire school are upended when everyone in the school is transported into another world. Seiichi finds himself alone and approached by a gorilla, who instead of attacking him, proposes to him. At the moment that Seiichi thinks that "I guess a gorilla is fine too," they find the Fruit of Evolution, and when they eat it, their lives are suddenly changed once again.
In the world of Gaeabrande, Goddess Ristarte is tasked with summoning a hero to save her world. The hero, Seiya Ryuuguuin, is an OVERLY cautious hero who’s obsessed with muscle training and buying armor before setting out to deal with low level creatures. It’s simply one overly cautious mission at-a-time for this invincible hero!
Hajime Nagumo and his high school class are suddenly summoned to a fantastical land as heroes. But while most of his classmates have powerful stats and abilities, Hajime does not. Underappreciated and unprepared, he tumbles into the depths of a monster-infested dungeon where voracity and sacrifice are his only options. To thrive in this savage world, he’ll have no choice but to welcome the abyss.