Frank Warmerdam, project lead, has announced the immediate release of the PROJ 4.7.0 Cartographic Projections library. The new version is available from:

https://download.osgeo.org/proj/proj-4.7.0.tar.gz
https://download.osgeo.org/proj/proj-4.7.0.zip

Important is the regeneration of the “nad/epsg” init file with EPSG 7.1 database which now includes support for the Google Mercator (EPSG:3857). Furthermore, a substantial acceleration in some application environments is gained through a new cache implementation and and various thread safety improvements could be implemented.

PROJ 4 is used in many GIS applications including GDAL, GRASS GIS, QGIS, PostGIS, Mapserver, OSGeo4W and others.

The project pages are at:
https://proj.osgeo.org/