First is from given~ 1000/10 one of the first BL anime's I've seen that hasn't fetishized or been nasty >~<
Second is Rin from Ao no Exorcist (blue exorcist)~ Pretty good if you like "adventure" and paranormal (and a bit of ecchi 0-0)
third is from Akame Ga kill~ Don't watch unless you're like 14+ XD (it's not bad or anything, but there's some sensitivity issues)
Fourth is my bab, rin, from Free!!! Definitly watch, it's such wholesome (gay-ish) swimming anime ^^