Smile – née SmileOnMyMac – has upgraded its typing shortcut utility TextExpander to version 3.1.1. The maintenance release fixes a couple of serious bugs, including a potential crash and an issue that could cause you to lose all your saved snippets (the customizable shortcuts that you type to trigger longer text strings). The update also includes a fix for the Adapt to Case option. ($34.95 new, free update, 4.4 MB)
I've been using TypeIt4Me since System 7. It's the original of its kind. Even MS imitated it with "Autotype." It's still brilliant. The developer is very responsive and seems like a thoroughly nice guy.
It's no longer a system extension, but an application (though you wouldn't know this unless you looked hard). So it doesn't mess up anything in the system. The application is system wide, as always and works in every application, including the Finder, unless you specify otherwise.
Using this, I have built up a "shorthand system" that speeds up my typing enormously. I do a lot of typing, so this really helps.
I use TextExpander religiously and now have 400+ snippets. I literally couldn't type without it. I love the fact that it works anywhere the OS touches and is very stable. My only complaint is that it sometimes results in strange Clipboard behavior, but that's a small price.