WhiteDB is a fast, lightweight graph/N-tuples shared memory database library with a focus on speed, portability, and ease of use. There is no server process. Data is read and written directly from/to shared memory. No sockets are used between WhiteDB and the application program. It supports indexes (T-tree), persistence through logging and memory dumps, concurrency through locking, limited queries (conjunctive only), JSON, CSV and RDF support, Python bindings, command line utility tools, and JSON REST tools.
Tactor is a tool that tries to guess the best action for the current text selection. For example, text containing http://xyz.com is recognized as an URL link, and ~/Documents/MyPresentation.key as a presentation file. Both matchers and actions are fully customizable. It is loosely based on Plan9’s Plumber where any text can potentially be an action, although the actual technical implementation is very different. It provides functionality somewhat similar to that of Apple Data Detectors in a way that is fully extensible and transparent.