Update README.md

README.md

@@ -116,3 +116,40 @@ https://travis-ci.org/betaflight/betaflight
 https://github.com/betaflight/betaflight/releases
 
 
+## Open Source Notice
+
+Betaflight is software that is **open source** and is available free of charge without warranty to all users.
+
+Betaflight is forked from Cleanflight, so thanks goes to all those whom have contributed to Cleanflight and its origins.
+
+Origins for this fork (Thanks!):
+* **Alexinparis** (for MultiWii),
+* **timecop** (for Baseflight),
+* **Dominic Clifton** (for Cleanflight), and
+* **Sambas** (for the original STM32F4 port).
+
+The Baseflight  Configurator is forked from Cleanflight Configurator and its origins. 
+
+Origins for Betaflight Configurator:
+* **Dominic Clifton** (for Cleanflight configurator), and
+* **ctn** (for the original Configurator). 
+
+Big thanks to current and past contributors:
+Budden, Martin (martinbudden)
+Bardwell, Joshua (joshuabardwell)
+Blackman, Jason (blckmn)
+ctzsnooze
+Höglund, Anders (andershoglund) 
+Ledvin, Peter (ledvinap) **IO code awesomeness!**
+kc10kevin
+Keeble, Gary (MadmanK)
+Keller, Michael (mikeller)
+Kravcov, Albert (skaman82)
+MJ666
+Nathan (nathantsoi)
+ravnav
+sambas
+savaga
+Stålheim, Anton (KiteAnton)
+
+And many many others who haven't been mentioned....