A travel clothesline usually does the trick. I also pack a few clothespins which can be used to secure things near airflow. Occasionally, I also pack a larger S hook for things with lips/edges but no bars to secure a clothesline around. I find hooks to be useful on cruise ships.

You can make your own travel clothesline out of shock cord, as HoyaHeel mentioned. http://www.tombihn.com/forums/questi...othesline.html

There's a ConvertAHanger gadget for those "security" hangers http://1bag1world.com/2015/06/gear-r...onvertahanger/ but I'd rather just bring a swivel S-hook or find a few cheap plastic hangers and leave it behind.

Asian markets usually carry light plastic hanging racks if you really want something like a rack instead of a clothesline.

Uniqlo also offers quick dry innerwear for men and women. AirSim in the warmer seasons and HeatTech in the cooler.

AirBnB also has an option to filter search results for places with washer and/or dryer options. If you're at the planning stage, it can be useful to book a place with a washer X days in when you expect to do laundry. I can live without a dryer in certain climates but be careful about packing cotton polo shirts and mostly cotton denim. They require longer air dry time even in some hot and mostly dry climates/seasons. I've also learned that packing a bit of washer cleaner or knowing how to find some locally is useful if the washer has a funky smell. Not every country sells white vinegar or washer cleaner... A load with just boiled water can also help in a pinch.