http://en.wikipedia.org/wiki/Critical_path_method
Algorithm of Lawler
https://github.com/KnupMan/tasks-algorithm Algorithm for gantt charts tasks (uses matrix)
http://apppm.man.dtu.dk/index.php/Critical_Path_Method_(CPM)

https://github.com/ksti/CriticalPath
https://github.com/pajaro5/critical-path-method-1
https://github.com/MilanPecov/critical-path-method
https://gist.github.com/perico/7790396 Critical Path Method Implementation Javascript
--
https://github.com/graphp/graph

"Forced Force Directed Placement", enhancement of the classical Force Directed Placement algorithm by proposing a stronger force function. The FForce,
    https://medium.com/@sxywu/understanding-the-force-ef1237017d5
    https://stackoverflow.com/questions/12917037/what-algorithms-does-d3-js-use-for-the-force-directed-graph

--
    https://github.com/clue/graph
    https://stackoverflow.com/questions/12348258/how-to-represent-graph-datastructure-using-php-array/12377606
    https://www.codediesel.com/algorithms/building-a-graph-data-structure-in-php/
    https://github.com/mirahman/PHP-Data-Structure-and-Algorithms

    wf
        https://github.com/netzmacht/workflow
        https://github.com/phpmentors-jp/workflower
        https://github.com/ProcessMaker/nayra
        https://github.com/topics/workflow-engine
        https://github.com/Islandora/islandora_simple_workflow

        http://quasipartikel.at/data-js/

        aribnb kotlin lib similar to react-native
        airbnb moves to kotlin

    https://kotlinlang.org/docs/reference/native-overview.html


    https://gmazzocato.altervista.org/colorwheel/wheel.php

https://github.com/n-yousefi/Arg-Graph
http://js.cytoscape.org/
http://visjs.org/
*** https://github.com/dagrejs/dagre
http://sigmajs.org/

wf draw
    *** https://gallery.echartsjs.com/editor.html?c=xH1Rkt3hkb
    *** https://gallery.echartsjs.com/editor.html?c=xB1u1jeh87

    https://github.com/dagrejs/dagre Directed graph layout for JavaScript
         "dependencies": {
            "graphlib": "^2.1.7",
            "lodash": "^4.17.11"
        },

    *** https://github.com/dhotson/springy/ http://getspringy.com/ Springy is licensed under the MIT license.
    https://www.graphdracula.net/ usa raphaelle
    https://github.com/jgraph/mxgraph
    https://github.com/vasturiano/force-graph
    *** https://ialab.it.monash.edu/webcola/ d3 draw otro algroithm a force...
    *** https://github.com/dagrejs d3 based
http://bl.ocks.org/rkirsling/5001347 Directed Graph Editor
ejemplo https://resources.jointjs.com/demos/kitchensink

    https://github.com/mdaines/viz.js/ A hack to put Graphviz on the web. http://viz-js.com

    https://stackoverflow.com/questions/7034/graph-visualization-library-in-javascript lista muchas al nov 2018, https://stackoverflow.com/questions/8308516/multigraphs-with-javascript
    https://webmaster444.github.io/d3/d3work1/index.html
    https://bl.ocks.org/cjrd/6863459 Interactive tool for creating directed graphs using d3.js.

http://paperjs.org/

browser

    https://github.com/sinergi/php-browser-detector 0.002

// get_browser_name($_SERVER['HTTP_USER_AGENT']);
// Function written and tested December, 2018 https://www.256kilobytes.com/content/show/1922/how-to-parse-a-user-agent-in-php-with-minimal-effort
function get_browser_name($user_agent) {
        $t = ' ' . strtolower($user_agent);

        // Humans / Regular Users
        if     (strpos($t, 'opera'     ) || strpos($t, 'opr/')     ) return 'Opera'            ;
        elseif (strpos($t, 'edge'      )                           ) return 'Edge'             ;
        elseif (strpos($t, 'chrome'    )                           ) return 'Chrome'           ;
        elseif (strpos($t, 'safari'    )                           ) return 'Safari'           ;
        elseif (strpos($t, 'firefox'   )                           ) return 'Firefox'          ;
        elseif (strpos($t, 'msie'      ) || strpos($t, 'trident/7')) return 'Internet Explorer';

        // Search Engines
        elseif (strpos($t, 'google'    )                           ) return '[Bot] Googlebot'   ;
        elseif (strpos($t, 'bing'      )                           ) return '[Bot] Bingbot'     ;
        elseif (strpos($t, 'slurp'     )                           ) return '[Bot] Yahoo! Slurp';
        elseif (strpos($t, 'duckduckgo')                           ) return '[Bot] DuckDuckBot' ;
        elseif (strpos($t, 'baidu'     )                           ) return '[Bot] Baidu'       ;
        elseif (strpos($t, 'yandex'    )                           ) return '[Bot] Yandex'      ;
        elseif (strpos($t, 'sogou'     )                           ) return '[Bot] Sogou'       ;
        elseif (strpos($t, 'exabot'    )                           ) return '[Bot] Exabot'      ;
        elseif (strpos($t, 'msn'       )                           ) return '[Bot] MSN'         ;

        // Common Tools and Bots
        elseif (strpos($t, 'mj12bot'   )                           ) return '[Bot] Majestic'     ;
        elseif (strpos($t, 'ahrefs'    )                           ) return '[Bot] Ahrefs'       ;
        elseif (strpos($t, 'semrush'   )                           ) return '[Bot] SEMRush'      ;
        elseif (strpos($t, 'rogerbot'  ) || strpos($t, 'dotbot')   ) return '[Bot] Moz or OpenSiteExplorer';
        elseif (strpos($t, 'frog'      ) || strpos($t, 'screaming')) return '[Bot] Screaming Frog';
        elseif (strpos($t, 'blex'      )                           ) return '[Bot] BLEXBot'       ;

        // Miscellaneous
        elseif (strpos($t, 'facebook'  )                           ) return '[Bot] Facebook'     ;
        elseif (strpos($t, 'pinterest' )                           ) return '[Bot] Pinterest'    ;

        // Check for strings commonly used in bot user agents
        elseif (strpos($t, 'crawler' ) || strpos($t, 'api'    ) ||
                strpos($t, 'spider'  ) || strpos($t, 'http'   ) ||
                strpos($t, 'bot'     ) || strpos($t, 'archive') ||
                strpos($t, 'info'    ) || strpos($t, 'data'   )    ) return '[Bot] Other'   ;

        return 'Other (Unknown)';
}