diff --git a/doc/CHANGELOG b/doc/CHANGELOG
index 4dc111e8..65505ee9 100644
--- a/doc/CHANGELOG
+++ b/doc/CHANGELOG
@@ -1,5 +1,15 @@
 
 Changelog for SEMS 
+ - simple call generator application 
+
+ - fixed artifacts on wav files with extra chunks
+
+ - support for spandsp DTMF detection 
+
+ - callback application
+
+ - prepaid and click2dial applications
+
  - support for extra headers in dialout sessions
 
  - support for setting the URI of a session in SDP
@@ -16,7 +26,7 @@ Changelog for SEMS
  - outbound_proxy option sets next hop on outgoing dialogs and 
    registrations
 
- - b/f: don't reuse dialog for SIp authenticated re-sending of INVITE
+ - b/f: don't reuse dialog for SIP authenticated re-sending of INVITE
 
 Version 0.10.0 (final)
  - new module for exposing internal DI APIs via XMLRPC 
diff --git a/doc/Readme.callback b/doc/Readme.callback
new file mode 100644
index 00000000..b9c8eb90
--- /dev/null
+++ b/doc/Readme.callback
@@ -0,0 +1,17 @@
+Callback application
+--------------------
+
+This application FRs the caller with 468 Busy, and calls back 
+after some time. If the callback call is established, the called 
+party may enter a number, to which the call is connected in B2BUA 
+mode with media relay.
+
+Both the callback call to the caller, and the outgoing call 
+to the callee) are made and authenticated using a configurable
+account (From, domain and authentication).
+
+Allowed callback users may be specified with a regexp in the
+configuration.
+
+Used together with reg-agent this app can greatly reduce your
+mobile phone bill...
diff --git a/doc/doxyref.h b/doc/doxyref.h
index d667be11..0c8adfd2 100644
--- a/doc/doxyref.h
+++ b/doc/doxyref.h
@@ -143,6 +143,18 @@
  * <ul><li>  \ref ModuleDoc_pin_collect </li></ul>
  *
  * 
+ * \section Prepaid 
+ *
+ * This is a signalling-only prepaid engine.
+ *
+ *   <ul><li> \ref ModuleDoc_sw_prepaid_sip </li></ul>
+ *
+ * \section Click2Dial 
+ *
+ * An xmlrpc-enabled way to initiate authenticated calls: 
+ *
+ *   <ul><li> \ref ModuleDoc_click2dial </li></ul>
+ *
  * \section Scripting SEMS with Python 
  *
  * There are two application modules which embed a python interpreted into 
@@ -171,6 +183,10 @@
  * 
  * <ul><li> \ref ModuleDoc_reg_agent  </li></ul>
  * <ul><li> \ref ModuleDoc_registrar_client  </li></ul>
+ *
+ * \section Various applications
+ * 
+ *  <ul><li> \ref ModuleDoc_callback </li></ul>
  */
 
 /*! \page AppDocExample Example Applications
@@ -379,6 +395,31 @@
  *  Back to \ref AppDoc, to \ref AppDocExample.
  */
 
+/*! \page ModuleDoc_callback Module Documentation: callback application plugin
+ *  \section Readme_callback Readme file
+ *  \verbinclude Readme.callback
+ *  
+ *  \section Links
+ *  Back to \ref AppDoc, to \ref AppDocExample.
+ */
+
+/*! \page ModuleDoc_sw_prepaid_sip Module Documentation: prepaid_sip application plugin
+ *  \section Readme_prepaid_sip Readme file
+ *  \verbinclude Readme.sw_prepaid_sip
+ *  
+ *  \section Links
+ *  Back to \ref AppDoc, to \ref AppDocExample.
+ */
+
+/*! \page ModuleDoc_click2dial Module Documentation: click2dial application plugin
+ *  \section Readme_click2dial Readme file
+ *  \verbinclude Readme.click2dial
+ *  
+ *  \section Links
+ *  Back to \ref AppDoc, to \ref AppDocExample.
+ */
+
+
 // -------------------- example apps
 
 /*! \page ModuleDoc_conf_auth Module Documentation: conf_auth Application