Compose Special Characters v 2.0.11
Tags: Calc Writer
It's a new version of Compose Special Characters by chuckhenrich. Now it works on LO 6 and 7
Compose Special Characters lets you type two or three characters and use a keyboard shortcut to convert them into a single accented or special character.
You can also compose unicode characters using the 4 character unicode value.
Writer and Calc are currently supported.
After you install the extension you need to restart LibreOffice. After you restart LO you'll find Compose Special Characters on the Insert menu (Insert > Compose Characters...)