Ridual is a dual-pane file manager for GNOME. It features tight integration with GNOME (providing GVFS mount support, bookmarks and user directories, a removable drives list, file icons, and application associations), keyboard-oriented control (with adjustable shortcuts for everything, single-window dialogs, and messages), and advanced tasks and queues management.
White Elephant was created due to lack of line testing software like MonkeyJam for Linux. There are some animation programs for Linux, but the author needed more drawing options like in an image editor. The intended purpose is to test animations drawn in image editors like MyPaint and Gimp. These two programs have some plugins or hacks to work with animations, but they use layers as frames, and they don't have a real layer system to work with. That's where White Elephant comes in.
Klen-library is a program for creating electronic books. It consists of three modules, for editing books, reading books, and creating tests. It offers password protection of every book and the editing mode. The print function makes it self-sufficient, as it allows creation of books without using third-party text editors. It uses SQLite, so you don't have to install a database server. It can export to the XWB, HTML, TXT, PDF, PostScript, and RTF formats, and can import from XWB, HTML, and TXT.
TeXstudio is a fully featured LaTeX editor. It is designed to make writing LaTeX documents as easy and comfortable as possible. It features an integrated PDF viewer with (almost) word-level synchronization, live inline preview, advanced syntax highlighting, and live checking of references, citations, LaTeX commands, spelling, and grammar.
Griffon is dekstop application development platform for the JVM. Inspired by Grails, it leverages the Groovy language and concepts like convention over configuration. The Swing toolkit is the default UI toolkit of choice however others may be used, principaly SWT and JavaFX. Developers may use a combination of the Groovy and Java as well as other JVM languages such as Scala, Clojure, Mirah, and Jython. It encourages the use of the MVC pattern and follows in the spirit of the Swing Application Framework (JSR 296) by defining a simple yet powerful application life cycle and event publishing mechanism.
GUI Builder is a drag and drop interface for creating WebElement User Interface (WUI) templates that can be used as the foundation of a responsive Wep app. It simplifies the process of designing applications, and encourages separation of the logic and view. It is part of the WebBot Web development framework, which makes it possible to build Web apps in a similar fashion to Qt/KDE apps.