Updates:
Woah, this seems to be based on this foss app itself 
(recently found)
- Floating Stickies:
genius.mohammad.floating.stickies
- Updated alternate to that: Vinyl music player
com.poupa.vinylmusicplayer
Found several updated or better apps for covering the basic functionalities:
- Phone dialer: Simple dialer - it looks awesome post v5.17.0 Material U refresh
com.simplemobiletools.dialer - Lists: Orgzly
com.orgzly - Maps: GMaps WV
us.spotco.maps - File explorers:
me.zhanghai.android.files
com.amaze.filemanager
Apps from izzyondroid repo:
- Launcher: Neo Launcher
com.saggit.omega - PDF Reader: MJ PDF Reader
com.gitlab.mudlej.MjPdfReader
Still missing: dictionary, touch blocker, screen text copier
(missing as in actually needing them often and wanting to be FOSS; not just a theoretical consideration):