EasyCustomLabeling
Allows to quickly duplicate layer into memory layer ready for data defined labeling. Requires Memory layer Saver >= 3.2 to restore all labels correctly BUT it is currently not yet available to QGIS 3
EasyCustomLabeling is a plugin for QGIS, designed to simplify the work for manual and data defined labeling. The tool duplicates a data vector layer into a new memory layer made of lines, adds all necessary fields for advanced custom labeling like label location, rotation, color, font, callout, alignements. The resulting layer is activated ready to use labeling tools. Data is saved in Memory Layer provider, which means it is NOT saved to a file or a database. To make thoses layers persistent, please install Memory Layer Saver v3.2 or higher plugin, that saves all memory layers to a qdatastream file along the project named myqgisprojectname.qgs.mldata.