Good site for apartments in Bangkok, includes categories for places with high speed internet, wifi, or close to mrt/bts but doesn't appear to allow combining of searches. Some really cheap places, like 3k THB and upwards.
An eco lodge and avocado farm built and run by a Canadian American couple outside of Antigua.
Bulungula, possibly the most inspiring place I have been on earth. Truly amazing.
Tucan hotel / hostel recommended by Chrissy in Guatemala.
Hostel with free wifi in San Jose, Costa Rica. From $12 a night in the dorm. Has a garden, pool, etc.
RedTag are a cheap flight / holiday search engine. Recommended by Canadians who found uber cheap tickets from Montreal to Belize City.
The Sathon Saint View serviced apartments just off Sathon Soi 11 in Bangkok (very close to where I used to live).
GumTree is a worldwide notice board where you can post classified ads on almost any topic. It's good for accommodation, very similar to craigslist but international.
The SYHA run all the YHA hostels in Scotland.