Ketchup uses several Open Source libraries.
PCL Storage provides a consistent, portable set of local file IO APIs for .NET, Windows Phone, Windows Store, Xamarin.iOS, Xamarin.Android, and Silverlight.
PCLStorage is licensed under the Microsoft Public License (MS-PL). The full text of the MS-PL is available at https://github.com/dsplaisted/PCLStorage/blob/master/LICENSE.
SQLite-net is an open source, minimal library to allow .NET and Mono applications to store data in SQLite 3 databases.
SQLite-net is copyrighted 2009-2016 Kreuger Systems, Inc. The full text of the license is available at https://github.com/praeclarum/sqlite-net/blob/master/LICENSE.md.
Html Agility Pack is an agile HTML parser that builds a read/write DOM and supports plain XPATH or XSLT. It is a .NET code library that allows you to parse “out of the web” HTML files.
Html Agility Pack is licensed under the MIT License (MIT). The full text of the license is available at https://github.com/zzzprojects/html-agility-pack/blob/master/LICENSE.
Popular high-performance JSON framework for .NET. Learn more at https://www.newtonsoft.com/json
Newtonsoft.JSON is licensed under the the MIT License (MIT) and copyrighted 2007 James Newton-King. The full text of the license is available at https://github.com/JamesNK/Newtonsoft.Json/blob/master/LICENSE.md.
SharpZipLib (#ziplib, formerly NZipLib) is a compression library that supports Zip files.
SharpZipLib is licensed under the MIT license. The full text of the license is available at https://github.com/icsharpcode/SharpZipLib/blob/master/LICENSE.txt.