Are there other useful cat options?

Yes, there are several useful options for the cat command that can enhance its functionality. Here are some notable ones:

-E: Display a $ at the end of each line, making line endings explicit.
```
cat -E filename.txt
```
-A: Show all non-printing characters (equivalent to -vET).
```
cat -A filename.txt
```
-b: Number non-blank output lines only.
```
cat -b filename.txt
```
-s: Suppress repeated empty output lines.
```
cat -s filename.txt
```
-T: Display TAB characters as ^I.
```
cat -T filename.txt
```
-v: Use ^ and M- notation for non-printing characters, except for line feeds and tabs.
```
cat -v filename.txt
```

These options can be very helpful for managing and viewing text files in various ways. If you need more information on any specific option, let me know!