LibreSheets will have at least :
*Sheets management (all songs, grouped per ensemble and set lists)
*Non-destructive PDF editing¹ and annotation² (1]cropping, merging/splitting and fine-grained rotation. 2]stamps, highlight)
*Support for PDF and midi-files (and hopefully more, like multiple image files)
*Auto-scrolling, Bluetooth pedal control and link-to (for D.C./D.S. and Coda jumps etc)

Suggestions and contributions are very welcome and I will create a Git project ASAP!