Though vs Although vs Even Though

Though, although and even though are used to show a contrast between two clauses:

Our new neighbours are quite nice (this is good) though their two dogs bark all day long. (this isn’t good)

We can use though or although with no difference in meaning. But, some differences are:

Though is more common than although in conversation or writing.

Though (but not although) can come at the end of a sentence:

My new bike is really fast. I don’t like the colour, though.

Though (but not although) can be used as an adverb:

I’m not good at maths but I can help you with your geography, though, if you want.

The meaning of though is similar to however, but though is much more common than however in conversation.

Even though can be used to make the contrast between two clauses stronger:

Dad got back from work really late, even though he had promised to take mum to the cinema.

Source: http://www.britishcouncil.org/learnenglish-central-grammar-definitions-conjunctions.htm#though