colibris79
There is. I'm almost sure, that the necessary functions are in the viewer-binaries and also mostly included in the fsk-frontend.
What's missing is a "system" keyboard for 300/505.
There are some efforts in apps like calendar, CLi and frotz but I think "typing" could be speed up by using numeric-buttons for input.
Like it is done in Clemensekens Dictionary.
I took a start on it
over in my Sim-Thread
But it depends mostly on the weather on weekends, when you will see some progress on this.