I use Zettlr. It's also a Markdown manager. However you can define a folder as a project. Which helps to keep related notes orderly. Also you can export the whole project or one note as a pdf (using pandoc) or docx, odt, html... You can attach files to your note too. That being said I really enjoyed the idea of Trilium. Especially the fact that you can write your own scripts.You may be able to add scripts and make spreadsheet or SketchUp files first class documents.