Before someone may asks, I searched for questions about this but didn't find anything close to that subject. Additionally, if my question is in the wrong place, please let me know and point the correct Stack network to post it.
I need to learn some pre processors because I've passed a long time working just with backend (actually I'm a web designer and not developer) but now I'm seeking for jobs in US (I'm from Sao Paulo) and today any job seeker needs to have some pre processors to work with front-end and design staff in US, that's a must and very required. Then, before get start using one or other, I'd like to know from you, front-end professionals, what's your opinion about that question and which one you have been using for your projects. In addition, I need to know which one fits better or has a better integration with Dreamweaver CC.
Thank you!