Better / new UI User Tasks or other solutions

I want to ask, maybe someone of you knows… I want to create an UI, so the user can do something over the UI (for example something like the User Tasks that are in Camunda). The thing with the user Task is, that the don’t look good, they are not configurable (bigger / smaller, place / position where do they show up).
Can someone of you recommend me something new / something else?
Are there some example projects that I can take a look at?