The Rosetta Code project is quite interesting:
The idea is to present solutions to the same task in as many different languages as possible, to demonstrate how languages are similar and different, and to aid a person with a grounding in one approach to a problem in learning another. Rosetta Code currently has 1,362 tasks, 423 draft tasks, and is aware of 1,016 languages, though we do not (and cannot) have solutions to every task in every language.
There is a page for Factor with some programming language history, notes, and a list of tasks not implemented in Factor. If you are new to learning Factor, this might be a fun way to learn and contribute.
The rosetta-code vocabulary includes words for scraping solutions from
Rosetta Code, while the rosetta-code/solutions directory contains all
the currently scraped solutions.
Currently this is a fair amount of code:
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Language Files Lines Code Comments Blanks
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Factor 1775 85304 13958 64726 6620
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