I use Grammarly by registering on grammarly.com then I sign in and open a new document. I enter title and poetry text there. I check for error reports and suggestions then I can copy the new version and exit. The document stays online to serve as a backup. I then visit poemhunter.com and sign in and submit a new poem. Are there other checkers that improve upon the free Grammarly service? Google finds all sorts of free software yet I would prefer an online checker that does not need to me start yet another program. My poetry websites require such resources and here they are:

http://denismartindale.co.uk

http://denis-martindale.blogspot.co.uk

Are there any British spelling checkers?

In general, I use the Quora website for more information to help writers and poets. So it's possible that other members here could benefit from that information, too.

http://quora.com