I'm programmer myself, so I'm used to using autocomplete in various forms in various IDEs. Right now I'm writing my master thesis and it struck me, that I don't know any editor with word autocompletition. I'm not talking about keyword completition, but natural language one.
Yes, MS Office and Libre/Open Office can complete some words, but the support is rather poor at best. On mobile platform there are many smart keyboards which offer autocorrect and autocompletition. One example would SwiftKey for Android, which learns your typing style and offers you next word in sentence automatically.
Is there something like that for personal computers? Windows preferably, but Unix is fine too.
UPDATE: I'm looking for some solution which would speed-up writing in text editors in similar way programming IDEs work. This means the editor would provide me with list of option which would fit the sentence based on what I have written so far. Or the editor would provide me with list of words based on few letters.