I love PhraseExpress. It basically works like Word's autocorrect, but in all programs. I use it a lot to expand short abbreviations into long text, and to autocorrect typos (e.g. 'kr,.' is converted automatically into "Kind regards, <return><return>My Name", and 'teh' to 'the'). I can use it to quickly enter symbols, too: typing 'kruis,.' for example, pops up a menu with different cross-like symbols: ☓, †, ✚, etc. (kruis is Dutch for cross). It can do more - like remapping keys - but these are the functions I use. You can use it to type diacritics too; I normally use the US International keyboard for that, but there is one annoying program I sometimes need to use where that doesn't always work. PE is free for non-commercial use.