Merge pull request #646 from jotapegit/patch-1

CTimelines added to welcome.mdx

docs/developer-resources/welcome.mdx

@@ -71,7 +71,7 @@ You can also explore Cardano assets using a variety of [explorer tools](/about-c
 To start working with smart contracts, see:
 
 - [Developer portal smart contract tutorials](https://developers.cardano.org/docs/smart-contracts/)
-- [Plutus Core documentation](https://plutus.readthedocs.io/en/latest/index.html)
+- [Plutus Core documentation](https://plutus.readthedocs.io/en/latest/index.html).
 
 There are also many languages you can use to develop smart contracts:
 
@@ -88,6 +88,7 @@ Explore Cardano's ecosystem:
 - [A list of community-built developer tools on Cardano](https://www.essentialcardano.io/article/a-list-of-community-built-developer-tools-on-cardano)
 - [Builder tools](https://developers.cardano.org/tools/)
 - [Cardano Cube](https://www.cardanocube.com/cardano-ecosystem-interactive-map)
+- [CTimelines](https://www.ctimelines.io)
 - [Built on Cardano](https://builtoncardano.com/).
 
 ## Going further