If you know of any useful websites or perhaps run one yourself, feel free to recommend it. If I find your site suitable for my weekly feature then I will do my utmost to accommodate it. In return I might merely ask that you link to my blog. But please (and I mean this in the politest possible terms) do not ask me to advertise your commercial service.
For those who like a challenge and regular deadline to motivate their writing, this site “With Painted Words” might be just your thing.
Each month a new picture is posted as a prompt. It can be as vague or as faithful as you like but the piece you write must be relevant in some way to the image. The maximum word count is 1000 words so effectively this is a site with monthly flash-fiction prompts.
And the best thing about it is that you get to earn money if your work is published. $3US (approximately £2 or €2.20). Not a huge amount but a small financial reward is always appreciated by the keen writer.