db4o is an object database for Java and all .NET environments. Its features include ACID transactions, automatic class schema recognition, query-by-example, a S.O.D.A. object querying API, native queries, LINQ support on .NET, callback methods, memory files, cascade-on-delete, multi-threaded access, and Java Webstart and servlet support.
Open Transactions is a solid, easy-to-use, financial crypto and digital cash library, including an API, server, and test client. It features anonymous numbered accounts, untraceable digital cash, triple-signed receipts, basket currencies, and signed XML contracts. It also supports cheques, invoices, payment plans, markets with trades, and other instruments. It uses OpenSSL and Lucre blinded tokens.
The Aspose.Email for Android API enables developers to design Android applications for managing and manipulating Outlook email file formats without using MS Outlook. It provides tools to create, read, and convert the Outlook MSG, PST, EML, EMLX, OST, and MHT file formats. It manages recipients, subjects, message bodies, and attachments in MSG documents. It creates and save appointments in draft format, extracts and saves calendar items from a PST, and adds Mapi Items such as Messages, Contacts, Notes, Journals, and Tasks to a PST. It also lets you manipulate message attachments with just a few lines of code.