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