diff --git a/whos_using/using.qbk b/whos_using/using.qbk
index 565c00c..02e3e04 100644
--- a/whos_using/using.qbk
+++ b/whos_using/using.qbk
@@ -445,6 +445,13 @@ used are:
 [@../../libs/type_traits/index.html Type Traits]
 ]
 
+[blurb [*SmartWin++]\n\n
+[@http://smartwin.sourceforge.net/ SmartWin++] 
+is a 100% free GUI library for developing Windows applications, 
+it's free both as in "free beer" and as in "free speech", you can freely use 
+SmartWin++ for commercial applications and for Open Source applications!
+]
+
 [blurb [*Open VRML]\n\n
 [@http://openvrml.org/ Open VRML] is a free cross-platform runtime 
 for VRML. 
@@ -693,6 +700,14 @@ The Boost librarie sued were:
  [@../../libs/lambda/index.html Lambda]."]
 ]
 
+[blurb [*The Yake Engine]\n\n
+[@http://www.yake.org/ The Yake Engine] 
+is a component-based, object-oriented engine written in C++ 
+and primarily designed for VR applications and games. It abstracts typical 
+low-level and middleware APIs and provides various low, mid and application 
+level functionality as well as tools to create and import content.
+]
+
 [endsect]
 
 [section:inhouse In House Boost]