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univac - API and CLI to generate Abstract Syntax Trees (AST) of several well-known programming languages using antlr4 grammars
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render-dot - Render Graphviz .dot files to svg, png, dotx, json, jpeg, ps, etc using several graph engines, for browser, node and command line
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svg-png-converter - Convert SVG/PNG and back, both in browser and node.js. JavaScript API and Command Line