A hex editor Eclipse plugin and multi-platform desktop application
You can install the latest Eclipse plugin version from the update site https://javahexeditor.sourceforge.io/update or the Eclipse Marketplace https://marketplace.eclipse.org/content/java-hex-editor. Older versions of the Eclipse plugin are available via the update site for the version, e.g. https://javahexeditor.sourceforge.io/update/0.5.1
You can download the latest stand-alone version and older versions on the "Files" tab.
FaceIt is a multifunction Rich Client text editor written in Java with the added attraction that it uses the SWT and JFace libraries from Eclipse. Binary jar download needs SWT DLLs from Eclipse 3.0 to run on Windows. Source zip has the JFace libraries.