It's hard to explain but I would use "although" when comparing two things. "I can go to the bar, although I have to work tomorrow." "Even though" can take the place of "although" in that sentence. In that sentence, you're considering whether or not to go to the bar. If "even if" was used, you would've decided that you're going to go to the bar. "Though" usually means you're still deciding, like "although" and "even though". I hope you understand.

Although = "a pesar de que" Even though = "unque" Even if = igual es "aunque" pero tiene un sentido mas como "aun asi si..." Though= tambien es "aunque" pero se entiende mas para expresiones como "pienso.."