This reply will be helpful for those seeking temporary living arrangements in Guadeloupe, from a few weeks to a few months.
Of course, there is always couchsurfing.org for those who want to stay with a local.
For the French equivalent to Craigslist, I recommend a site I visit many days a week for various reasons: Le Bon Coin. (The good corner, or the right neighborhood or spot...) It's all in French and I don't see any English language option. If you make an effort to translate the words on the site you can understand easily enough I believe. Contacting the posters on the other hand may prove more difficult if there is a language barrier.
I did a fast search on Craigslist and found one English language listing for Guadeloupe rentals, in Grande Anse. A beautiful neck of the woods, the north east tip of Basse-Terre.
vrbo.com is a site I have used once or twice. I never actually rented but was in contact with some of the owners/posters, and received fast replies with complete and personal answers.
This is an edited version of my original post about finding a place to stay in Guadeloupe:
wp.me/p1zreZ-7h