The National Geospatial-Intelligence Agency (NGA), in collaboration with BIT Systems, makes available under the MIT License a collection of OGC GeoPackage spec libraries listed as GeoPackage implementations. The NGA GeoPackage Libraries include creation, visualization, and management SDKs including sample applications for Android and iOS.

GeoPackage

A SDK that provides the ability to manage GeoPackage files providing read, write, import, export, share, and open support. Open GeoPackage files provide read and write access to features and tiles.

Java:
    A Java library providing GeoPackage functionality and command line tools.
                            API         

Android:
    An Android SDK providing GeoPackage functionality and utilities to Android apps.
                            API         

Android Map:
    An Android Map SDK providing GeoPackage map functionality (includes GeoPackage Android).
                            API         

iOS:
    An iOS SDK providing GeoPackage functionality and utilities to iOS apps.
                            API         

Core Java:
    A non-standalone library providing core GeoPackage functionality to Java and Android libraries.
                            API         

JS:
    A JavaScript library providing GeoPackage functionality and utilities to node and web applications.
                            GeoPackage Viewer

Extensions
    NGA defined GeoPackage extensions.

MapCache

An app that utilizes and demonstrates the functionality in the GeoPackage Mobile Libraries.

Android:
    An Android app that can be built and installed from Android Studio or directly from the APK.
                            APK

iOS:
    An iOS app that can be built and installed from Xcode.
                            Movie

WKB

A non GeoPackage specific library for writing and reading Well-Known Binary Geometries to and from bytes.

Java:
    A Java library providing Well-Known Binary geometry definitions and functionality.
                            API         

iOS:
    An iOS library providing Well-Known Binary geometry definitions and functionality.
                            API         

TIFF

A non GeoPackage specific library for reading and writing Tagged Image File Format files.

Java:
    A Java library providing Tagged Image File Format functionality.
                            API         

iOS:
    An iOS library providing Tagged Image File Format functionality.
                            API