If you liked the Mahou Shoujo Madoka Magica anime, the Anime-Planet community thinks you'd like:
In the near future, the internet has evolved into ComNet, a virtual reality world where people can play to their hearts' content. However, a malicious computer known as Grosser is causing chaos in the realm, sending dastardly programs to wreak havoc. Young Yui was just a typical girl with a not-so-typical illiteracy with computers, until a program known as IR recruited her to become a Corrector and fight against Grosser's evil doings! Armed with elemental suits, Yui will traverse feudal Japan, a land of fairytales and a number of other virtual worlds in an attempt to find the other Corrector programs and foil Grosser's gang!
Kimimaro Yoga could use a break. At nineteen years old, he's not only a student at Heisei College of Economics, he's also a part time employee and flat out broke. So when an eerie man offers the boy a special ATM card and an exorbitant amount of cash, Kimimaro gives in to temptation – but there's a catch. In exchange for his good fortune, Kimimaro's very future is put at stake, held as collateral by the Bank of Midas and tied to the amount of yen in his bank account. In addition, he must participate in a special battle every week in the mysterious 'Financial District' – a battle where losing against one's opponent can mean bankruptcy, a fate that carries an unthinkable cost in the normal world...
While these series may seem miles apart, they both focus on a main character that can't completely decide which world they want to live in and what they want to do with it. Eventually, they finally decide and cause a very similar ending in each. Without spoiling, all I can say is if you liked the ending in one, or the struggle to decide what's right and wrong, and who to believe, it's definitely worth giving the other one a try.
Both are magical girl shows with actually dangerous villains, bringing in a horror element to the mix. However, both still contain the message of the importance of friendship that is a staple of the genre. Puella Magi Madoka Magica is darker with more sci-fi elements, but if you like one you should stand to check out the other.
Both involve ordinary person taken into world of magic and power to grant one wish. These series might not look so similiar on the first glance but after digging deeper into the storyline similarity is stunning.
(You might have to read the Visual Novel to fully understand Unlimited Blade Works.)
Japan, present day: Alien Invaders are everywhere, taking over peoples' bodies. Fighting them is Isuzu Ayane, an introverted young girl with the ability to control powerful dimensional Gates. Under the guidance of Kageyama Reiji, a mysterious businessman, she battles Invaders and recruits new Gate Keepers. Will she and her new comrades be able to save the earth?
Both of these animes involve young girls fighting against monsters that are not all they seem. While Gatekeepers also has male magic users, both of these animes seem to take the Magical Girl genre and shake it up. The character types are also very similar (whiny one, fighting one, emotionally challenged one... etc). Also, aliens.