Android: Stingy data allowances can make browsing on your smartphone stressful. Fresh-out-of-beta Opera Max can compress data on the server side so you use less of your data, and will work with most apps that don't use encrypted data.
The one nuisance right now is that there's a wait list. Opera wants to slowly test out its server capacity, so when you download the app, you'll be put in a waiting list. Fortunately, the line is moving relatively quickly. Once you're in, you can browse to your heart's content while Opera quietly packages your data into bite-sized chunks for you behind the scenes.