EntityFS is an object-oriented file system API for Java. It has a rich set of powerful file and directory manipulation tools that makes it much easier to work with file system entities from Java. The file and directory interfaces are implementation-independent, and there is support for building file systems on disk, in memory, or in Zip or Jar files. File systems can also be configured to support capabilities such as file data compression or metadata.
HeliDB is a database for storing key-value pairs from a Java program. The client program creates one database object per database file. The database objects can be configured to support different capabilities. In its simplest configuration, a database is a file-backed map. More advanced configurations can give it transaction support or fast record searches by indexing records in a B+ tree.
Glue Stick is a dependency injection framework for Java applications. Beans may be defined in Groovy scripts, GSON configuration files, or Spring Framework XML files. Compared with other dependency injection frameworks for Java, Glue Stick aims to be faster at assembling applications and simpler to use.