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click on quickpet (last icon on the Lucid desktop) for a variety of software
complete programs installed with required binaries (shared dependencies)
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Up to 6 compressed and complete programs can be swapped in and out of memory
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Puppy Package Manager. Extra programs for Lucid.
Use the forum See what is available or put in a request
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Use Linux portable apps
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You can add Ubuntu and Debian packages. There is high but not total compatibility.
Use Java (Javascript is a different language available in most major browsers)
Click on Quickpet / Useful Pets / JRE Java Runtime Environment
Run java applications such as Japplis