Together with the ShareX extension (FF and Chromium), using with FileCoffee (setup script), a killer app
(FileCoffee isn't OpenSource, but i recommend it as one of the most private host and sharer (images, multimedia, video, documents, presentations, text.....), 100% free (account (free) optional), made in the EU (Netherland), best replacement of Imgur, which is a little less than spyware.)
Instead of Start11, use Rainmeter (FOSS), to customize not only the taskbar, but almost the whole UI + all kind of widgets. You can create your own skin (scripts), or use one of the hundreds made by the community in Deviantart and other sites (links in the homepage). Complete Wiki and tutorils.
Before i forgot that i use also FreeTube and SMplayer as externplayer, if FreeTube fails, Gimp and Krita, but i think that these are already well known apps.
It’s not that powerful but does the job, but if you want more advanced ones. This tool has almost every single one of them. With one click, you can download any debloater.