MK Lib
Utilities for extensions
MK Mailer
Provides a asynchronous mail system with full template support
MK A/B Testing
A/B Testing of content elements
T3 SOCIALS
This TYPO3 extension provides an API to communicate with socials networks. So it's possible for example to publish newly created news (or whatever you like) directly into social networks.
MK DAM2FAL
This extension migrates your DAM-data into FAL for Typo3 6.2.