Update README.md

Added Salesvid (Sales email video tool) to Newsletter section and Complish (Async team collaboration tool) to project management and collaboration section.

README.md

@@ -1455,6 +1455,7 @@ Thanks to our main contributors
 * [Mailjet](https://www.mailjet.com)
 * [Mailup](http://www.mailup.com)
 * [Newsletter Creator for Gmail](https://chrome.google.com/webstore/detail/newsletter-creator-for-gm/cihaednhfbocfdiflmpccekcmjepcnmb)
+* [Salesvid](https://www.salesvid.io)
 * [sendinblue](https://www.sendinblue.com)
 * [Sendicate](https://www.sendicate.net)
 * [Sendloop](https://sendloop.com)
@@ -1824,6 +1825,7 @@ Thanks to our main contributors
 * [Collabtive](http://collabtive.o-dyn.de)
 * [CollaborateCloud](http://www.collaboratecloud.com)
 * [Comindwork](http://www.comindwork.com)
+* [Complish](https://www.complish.app)
 * [Conceptboard](https://conceptboard.com)
 * [Confluence](https://www.atlassian.com/software/confluence)
 * [CoSketch](http://cosketch.com)