Not all locations where I have my numerous coffees have wi fi, as hard to believe as it may be. This is where WLW for Windows, or MarsEdit for Mac, come in handy.
Although Microsoft has not kept WLW updated in the last few years, the latest 2012 version seems to still work well on Win 7 and 8.1. MarsEdit just had a recent update, so you do get support with what you pay for.
Both are highly recommended for those who like to, or have to, work offline.