A lot of conlangs use custom symbols/alphabet. One of languages designed by me does this too. Because it might be hard to locate generators for some less famous conlangs, we can link all of them here (in answers)!
This might be useful for placing text in the language on the site itself, if the generator supports exporting as image.
If there is a tag defined for a specific language, you can use it in your answer, by adding
[tag:language-name], so it's easier to search for it.