Awesome
Siaqodb
https://www.nuget.org/packages/Siaqodb/
Cross platform
Siaqodb is a NoSQL embedded object and document database engine that currently runs on .NET, MonoMac, Universal Windows Platform (UWP), Xamarin.iOS, Xamarin.Android, Xamarin.Mac and Unity3D.
Sync
Siaqodb client side database may be synchronized with a Cloud/Server side database like CouchDB, MongoDB or Azure Storage.
Features
ObjectDB and DocumentDB – objects of an object graph may be stored individually or as a single unit called document. Fully ASYNC API ACID transactions – uses a powerful storage engine: LMDB Small footprint, no extra dependencies Built-in or plug-able Encryption Support SiaqodbManager – managed stored data, run ad-hoc LINQ queries
Developers goodies
Full LINQ provider Full POCO support Portable Class Library support Partial object loading and Eager loading May store full object graphs, Arrays, Lists, Dictionaries, etc. Thread Safe – full support for ASP.NET based apps
Siaqodb Sources
The latest branch is LMDB_Storage
Documentation
Can be found here: https://github.com/morecraf/Siaqodb/wiki