Graylog2 GELF support added

I've added GELF output support to nxlog in version 1.4.624.
Now with this enhancement it is possible to collect logs from several platforms and sources and to forward it to graylog2 in GELF format so that the structured data is preserved and is available for search and analytics. The most notable source is probably Windows EventLog (from XP to W7) as you were requesting this, but I should note that there is a lot more that you can do with it.

Support both XML and JSON - Open Source Logging

XML and JSON is now supported as of version 1.4.615. nxlog can parse and generate both of these formats with the addition of two new extension modules: xm_json and xm_xml.
nxlog is the first open source logging tool to support both of these formats for parsing and generation. This paves the way for structured logging over standard formats. Now it is possible to convert logs between even more formats with the addition of these two.

nxlog v1.4.607 released

The documentation has been greatly enhanced. Some possible memory leaks and race conditions were fixed. The code can now be compiled with older APR 1.2. Group memberships are honored on Unix/Linux, and a regression in the im_file module has been fixed when using wildcards.

nxlog v1.4.571 released

The code can now be compiled for Android. SNARE Syslog format support has been added for output. The im_mseventlog module can now produce output in UTF-8 and its error handling was enhanced to be more fault tolerant against the EventLog subsystem's failures. The im_mseventlog and im_msvistalog modules now set the AccountType and Category fields. A ReadFromLast configuration directive was added for the im_mseventlog and im_file modules.