Update MIGRATING.md

MIGRATING.md

@@ -201,6 +201,9 @@ Old content that is possibly out of date
 - Try flow2ts: `npx flow2ts` - doesn't work 100% but saves some time ([see this and other tips from @braposo](https://github.com/typescript-cheatsheets/react-typescript-cheatsheet/pull/79#issuecomment-458227322) at TravelRepublic)
 - [Incremental Migration to TypeScript on a Flowtype codebase][entria] at Entria
 - [MemSQL's Studio's migration](https://davidgom.es/porting-30k-lines-of-code-from-flow-to-typescript/) - blogpost with many useful tips
+- Retail-UI's Codemod: https://github.com/skbkontur/retail-ui/tree/master/packages/react-ui-codemodes/flow-to-ts
+- Quick-n-dirty [Flow to TS Codemod](https://gist.github.com/skovhus/c57367ce6ecbc3f70bb7c80f25727a11)
+- [Ecobee's brief experience](https://mobile.twitter.com/alanhietala/status/1104450494754377728)
 
 ## Results