1) Tanaka kun is always listless
Very calm and nice anime. Watching ep 1 I thought I would discard it. But the mood grew on me and I liked the kind of humor and scenes shown. I can't say I understood all gags or liked them, but it did pretty well to entertain me. Pretty sure that one is under everyone's radar.

2) Nijiiro Days
Basic animation, 13 minutes eps... I usually never watch such a show. But I did nevertheless because the storytelling was much better than your average teenage love anime.

3) Haifuri
Mainly for the 5 first eps. Despite many flaws, for some reason I like the action and kept watching for more.