A streaming media server you host yourself. Can run without a container as a first-class implementation (thank you!) Designed with web browsers specifically in mind, not client software. Written in Java, but nobody's perfect (recommends the OpenJRE!)
A tool which interfaces with Signal on behalf of one of your devices to send text messages. Designed for use in scripts. Written in Java, in the AUR, I probably already have it installed on Leandra.
Textricator is a tool for extracting text from PDFs and generating structured data (CSV or JSON). It can even work on OCR'ed documents. Describe what the document's contents look like with a YAML file and it'll extract the data using those fields. Can also be used as a Java library.
OpenRefine (formerly Google Refine) is a powerful tool for working with messy data: cleaning it; transforming it from one format into another; and extending it with web services and external data.
Written in Java 8.
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A utility that converts Javadocs into source code.
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An open-source drum machine and MIDI sequencer that also uses AI technology to figure out melodies for the patterns you program.
A utility that analyzes Java bytecode for vulnerabilities.
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An open source GUI app for Linux which helps you clean out old tempfiles and logs that are taking up disk space. The fact that this also makes for good personal information hygine is parenthetical. Can clean out files for Firefox, bash, Beagle, Flash, and more.
Personal finance software written in Java. Thus, it'll run pretty much anywhere. It comes as a single .jar file, so you can drop it into an encrypted volume along with the data files, which I suggest that everyone do. These ARE your finances, after all.
F/OSS software written in Java to split, merge, extract pages or images, and alter the contents of .PDF files in other ways. Works pretty well on Linux, haven't tried Windows yet.
How to configure the alternatives subsystem to replace the GNU implementation of Java with a Sun implementation.
An application written in Java that takes a PDF and rearranges the individual pages into signatures, suitable for traditional bookbinding.
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Somebody's implemented mDNS/multicast DNS/Bonjour/Avahi/Zeroconf in Java. The classes allow developers to give their applications the capability to announce themselves on the local network so that other systems can find them.
A free, open source, distributed search engine using peer to peer communication methods for both search and indexing. Fully decentralized. Written in Java. Install it, start it up, and turn it loose. Can also be used to set up stand-alone nodes for use on intranets, darknets (there's a YaCy instance somewhere in the Tor darknet), and probably single hosts (as a personal search engine).
How to install Sun/Oracle Java on an Ubuntu system. Some apps just aren't happy unless they can find Sun's trademark somewhere in the .jar files, I guess...
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