DeltaQt is a cross-platform library of C++ classes and functions for parsing of DELTA (DEscription Language for TAxonomy) files, and is part of the Free DELTA initiative. Support for all major data-related DELTA directives is planned. Typesetting directives are beyond the scope of the project, and support for them is not planned. Support for RTF formatting within comments, notes, descriptions, etc. is planned. All data defined by supported DELTA directives (including comments and annotations) will be parsed into memory. Qt (core) is used extensively.
EJDB is an embedded JSON database engine. It aims to be a fast MongoDB-like NoSQL library that can be embedded into C/C++/Nodejs/Python3/Lua applications. It features collection-level write locking, collection level transactions, string token matching queries, and a Node.js binding.