From: https://kokizzu.blogspot.com.au/2016/12/list-of-tech-migrations.html

Language conversions

digraph {
	Ruby -> Scala [ label = "Twitter (2011)" ];
	MongoDB -> PostgreSQL [ label = "Urban Airship (2011)" ];
	"?" -> Go [ label = "MoovWeb (2012)" ];
	Perl -> Go [ label = "NTP Pool (2012)" ];
	"C++" -> Go [ label = "DLGoogle (2012)" ];
	Ruby -> Go [ label = "SoundCloud (2012)" ];
	".NET" -> Go [ label = "SmartyStreets (2012)" ];
	Ruby -> Go [ label = "Toggl (2012)" ];
	MongoDB -> Riak [ label = "Shareaholic (2012)" ];
	MongoDB -> PostgreSQL [ label = "DigiDoc (2012)" ];
	MongoDB -> MySQL [ label = "Etsy (2012)" ];
	MongoDB -> PostgreSQL [ label = "TekPub (2012)" ];
	NodeJS -> Ruby [ label = "TargeterApp (2012)" ];
	Java -> NodeJS [ label = "PayPal (2013)" ];
	NodeJS -> Go [ label = "Koding (2013)" ];
	Ruby -> Go [ label = "Iron.io (2013)" ];
	PHP -> Go [ label = "Zalora (2013)" ];
	Ruby -> Go [ label = "TimeHop (2013)" ];
	Python -> Go [ label = "Canonical Juju (2013)" ];
	MongoDB -> PostgreSQL [ label = "Olery (2015)" ];
	Scala -> Go [ label = "CrowdStrike (2015)" ];
	Ruby -> Elixir [ label = "DockYard (2015)" ];
	PostgreSQL -> MySQL [ label = "Uber (2016)" ];
	MySQL -> PostgreSQL [ label = "President University (2015)" ]; 
	PHP -> Go [ label = "President University (2015)" ];
	MySQL -> PostgreSQL [ label = "UserLike (2015)" ];
	MongoDB -> PostgreSQL [ label = "UserLike (2015)" ];
	C -> Go [ label = "Bitly (2012)" ];
	Python -> Go [ label = "Bitly (2012)" ];
}

Used this vim regex
%s/^([^(]+ ([0-9]+)) from ([0-9A-Za-z?+.]+) to (\w+)/\t\2 -> \3 [ label = "\1" ];/

Online graphviz
http://www.webgraphviz.com/