If you already have a bachelor's degree you might want to consider a micromasters from EDX, these are 12-credit graduate level programs and will only set you back about $1600 versus about $30,000 for a full-blown masters, these programs are open enrollment so you do not have to be accepted at the school to attend, also no GRE test. There are 100s of programs available, you can even get one from Harvard as long as you can handle Harvard-level coursework! You could have Harvard on your resume! There are other top-flight schools such as MIT, RIT, Cornell, University of Chicago, and UCLA Berkley! If you want to have a look at the schools available the list is here: Schools and Partners
Another credential that people can consider after a bachelors degree is a master diploma. It's less expensive than a masters degree and doesn't have you do things that won't contribute to your knowledge or skill in your field. It's more of a trade skill and a diploma focuses on the practical rather than philosophical. There's often hands on training and usually doesn't take quite as long as a masters degree (if you hustle). I can take 6 months to 2 years to get a master diploma and usually it is self paced to large degree. Just fyi!