There are still a lot of word processing programs to choose from, including Word LaTeX, WordPerfect, OpenOffice, and Ability Write. However, unless you are applying to a company that specifically asks for a resume in some other format, use Microsoft Word.
Before many hiring managers read resumes they electronically load or scan the resume into their Applicant Tracking System (ATS) and use an algorithm to screen for keywords related to the job. Those keywords identify resumes that seem to meet the job requirements. ATS systems are now used for more than 70% of new hires in the US, due to the number of people applying for jobs, the need to track applicants throughout the hiring process, and the reporting requirements of the US Federal Government Equal Employment Opportunity (EEO).
All ATS programs read Word but many of them cannot read resumes in any of the other word processing or PDF format. You want a clean Word format without tables, columns, text boxes, or headers/footers, so the ATS systems can read it correctly.
Please contact me if you need help with your resume.