a few shell (bash) solutions: 
cd some_dir

for f in Test*.txt ; do cat /tmp/commonfile.txt $f > Final.$f ; done
find Test*.txt -maxdepth 0 -exec cat /tmp/commonfile.txt {} > Final.{}
+ \;
for n in `seq 1 100`; do cat /tmp/commonfile.txt Test$n.txt > Final$n.
+txt ; done

[download]
The middle one will be more portable .. note that the third one produces different final naming scheme.

In reply to Re: Looping the files in directory to combine with a common file by davidrw
in thread Looping the files in directory to combine with a common file by Anonymous Monk

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