Addressing the issue of English language quality in manuscript writing

Many times, journal editors send back manuscripts (of authors from non-English speaking countries) to rewrite the manuscript by native or colloquial English speakers. Though professional service agencies are available, they are very costly to bear. How to overcome this problem? Please share your experiences! 

I have been using Grammarly which is a tool for correcting grammar and plaigarism test. You can download and install at grammarly.com

Good question! There are some AuthorAID mentors who are happy to help with language editing (see http://bit.ly/2If15iF).

Jude - is grammarly good? Is it also free?