A windows batch file for the node tool would be very handy. I've written my own which is based on cassandra-cli.bat:
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@REM The ASF licenses this file to You under the Apache License, Version 2.0
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if "%OS%" == "Windows_NT" setlocal
if NOT DEFINED CASSANDRA_HOME set CASSANDRA_HOME=%CD%
if NOT DEFINED JAVA_HOME goto err
REM Ensure that any user defined CLASSPATH variables are not used on startup
REM For each jar in the CASSANDRA_HOME lib directory call append to build the CLASSPATH variable.
for %%i in (%CASSANDRA_HOME%\lib*.jar) do call :append %%~fi
REM Include the build\classes directory so it works in development
echo Starting NodeTool
"%JAVA_HOME%\bin\java" -cp "%CASSANDRA_CLASSPATH%" -Dstorage-config=%CASSANDRA_HOME%\conf\ -Dlog4j.configuration=log4j-tools.properties org.apache.cassandra.tools.NodeCmd %*
echo The JAVA_HOME environment variable must be set to run this program!