If you liked the Steins;Gate anime, the Anime-Planet community thinks you'd like:
In an experimental city of despair and carnage, ORGAN will do anything necessary to gain power and wealth. Unfortunately for one underground boxer who was mutilated, a rogue doctor has given him what ORGAN specializes in and he despises: Texhnolyze body parts. Will these cybernetic appendages help exact his revenge upon the one who made him this way?
A man is miserable. Despite all his dreams of a “Rose-Colored Campus Life” filled with raven-haired maidens who dote on him, his social life is going nowhere. He has no girlfriend, his only good friend keeps getting him into trouble, and the circle he joined brings him no joy. So he tries again, and again, reliving his first two years of college life ad nauseum, making different decisions each time, having no recollection that he’s already done this all before. Will the man ever be satisfied with how his life turns out?
Both deal with alternate realities and "would have, could haves," yet the protagonist seemingly keeps coming up with the same result albeit through very different pathways.
If you enjoyed the exposition of the possiblilities in one you will like the other.
In today's technology-driven society, everything has to move with the times, and magic is no exception. As spells are cast with various magic "codes", made up of binary digits, a computer becomes just as useful to the aspiring mage as a magic wand. One such would-be wizard is Koyomi Morishita, a girl who suffers from a bizarre inability to cast more than one type of spell. No matter how hard she concentrates she can only use code to do one thing: summon metal wash basins, directly above people's heads more often than not! Hoping to improve her versatility, she becomes a student of voluptuous expert witch Misa Anehara. However, with malevolent "daemons" - monsters summoned by unscrupulous magic wielders - appearing at every turn, Koyomi will need all the help she can get!
This is a bit of an odd pair, but my excuse for recommending them is that both YWGM and Steins;Gateboth feature a lot of technology and gadgets, such as cellphones and computers. Yoku Wakaru has way more magical girl action, but if you like your codes, you might give it a shot too.