I hold offers from
1) International Civil and Commercial Law LLM of Leiden University,
2) International and European Business Law (LL.M.) of Trinity College Dublin,
3) European and International Business, Competition, and Regulatory Law of Freie Universität Berlin.
I plan to use the master's degree to find a job in international firms or organizations. I plan to work mainly on company law in the future. Which one do you think I should choose as a non-EEA lawyer, considering my goals, as well as the quality and reputation of the schools and programs?

Leiden and Trinity both have good reputations and Trinity is offering generous scholarships for successful students. If I were you I wouldn't consider Freie Berlin. 

I think it really depends on where you see yourself working. If you want to work in Germany (which is an excellent place for international lawyers), a German LLM will help you with the visa tremendously (by removing all obstacles to employment right after the degree). I think the same applies to the Netherlands. Unfortunately, visa considerations are a biggie for us non-EEU lawyers. I speak from my experience in Germany.

[Edited by Kangaroo on Jul 08, 2021]