Extension for Writer. It can make colorful text, draw a few simple shapes, change brightness of text, make anagrams, inversed text, uneven text. This extension creates a group "Text Effects" in Tools/Add-ons menu for 7 independent shortcuts.
To draw a shape, open a document with text or paste any text in a new document, no more than one-two pages. Then you can create a background by clicking the shortcut Tools/Add-ons/Text Effects/Chatoyant colors. Now you have a background and can draw a shape by going Tools/Add-ons/Text Effects/Painting. It will draw a shape. If your document is large (more than 2-3 pages), the process can take a few minutes.