GTK, which stands for the Gimp ToolKit, is a library for creating graphical user interfaces. It is designed to be small and efficient, but still flexible enough to allow the programmer freedom in the interfaces created. GTK provides some unique features over standard widget libraries.
The Oracle (formerly Sun) Java Platform, Standard Edition (Java SE or JSE) allows you to develop and deploy Java applications on desktops and servers as well embedded and real-time environments. The Java Development Kit (JDK) contains the essential compiler, tools, runtime libraries, and APIs for developers writing, deploying, and running applets and applications in the Java programming language. The Java Runtime Environment (JRE) contains the runtime libraries and tools for running applets and applications.
JFreeChart is a chart library for the Java platform that supports a wide range of charts including pie charts (2D and 3D), bar charts (horizontal and vertical, regular or stacked, with optional 3D-effects), line charts, XY plots, scatter plots, time series charts, high/low/open/close charts, candlestick plots, Gantt charts, Pareto charts, combination charts, and more. It is suitable for use in applications, applets, servlets, and JSP.
GnuTLS is a secure communications library implementing the SSL, TLS, and DTLS protocols and technologies around them. It provides a simple C language application programming interface (API) to access the secure communications protocols, as well as APIs to parse and write X.509, PKCS #12, OpenPGP, and other required structures. It is intended to be portable and efficient with a focus on security and interoperability.