WinTailViewer++ is a free Windows tool that allows you to tail log files and change the encoding by offering a bunch of features.
You can set the window size while display it as top most. Also you can read the log while you're using another window by setting the window opacity.
Description by Softpedia.com:
"An intuitive and easy to use tool designed for reading log files, providing users with the possibility to make the window transparent and carry on with their work.
WinTailViewer++...
Like Unix-Tail BUT:
- Runs with or without GUI
- Suspend and resume tailing at runtime
- Can monitor a set of Files
- Print output to a textfield, stdout or file
- Runs in "Grep" mode, too (Read files once)
- (Almost) the same options as Unix-Tail