A start for UI design inspirations might be UI-Patterns, that keeps a collection of somewhat useful pieces of UI that one can apply to their own design.
From their front page:
It has long been common practice to use recurring solutions to solve common problems. Such solutions are called design patterns; standard reference points for the experienced user interface designer. This website seeks to better the situation for the UI designer, who struggles with the same problems as many other UI designers have struggled with before him.
This site will help you in two ways: You can read insightful design pattern articles or browse through our screenshot collection.
So, you can search for appropriate patterns and see related screenshots and maybe then try the actual software, when possible/if needed, to get a more thorough insight.