Elite: Dangerous Star Map - Red Star Eliminator (EDSM-RSE) is a plugin that displays names and distances to nearby systems of interest for projects of EDSM. Originally designed to seek out unknown coordinate stars, it has branched out to include several other projects.
Systems without coordinates originate from a time, when there was no journal file. Explorers would upload their flight path to EDSM by sending only the system name. Back then, manual trilateration was required to determine where the system is located in the galaxy. Because of this lengthy (and annoying) process, only a small percentage of the systems had coordinates associated to them. Since the introduction of the journal in EDSM, we no longer need to do this for new systems. But we have a backlog...
Other projects currently going on are: Scan populated systems - with the addition of nav beacon scans to the journal, EDSM and EDDN as a whole are interested in getting this data cataloged.