Glimpse 2.5.0 improves on the Digital Nautical Chart (DNC) rendering capability added in Glimpse 2.4.0. There is a tutorial available on the Glimpse GitHub Wiki describing how to download and display DNC charts in Glimpse.
Glimpse 2.5.0 also adds the ability to fetch and display Slippy Map tiles. See SlippyTileExample.java for an example.