Ability Write supports both the .rtf (Rich Text Format document) and .asc (ASCII text files) and such is a obvious choice for RTF to ASC conversion. But since both of these files are well supported, it should also be possible in other text editors / word processors.
Convert Rich Text Format document to ASCII text.
We found one software available in the database for this conversion.
Microsoft Windows software - convert rtf to asc on Windows
A fully featured word processor from Ability Office software suite
Convert from rtf file format
The table with program actions contains information about what each program is capable of doing with their files. This may be a good pointer for further searches for certain file conversions and help you find the converter you are looking for if our search result is insufficient for you. However, it is far from perfect and may sometimes show results which are not really usable because of the nature of the software handles the files. So a conversion that appears as possible, just because of matched actions, may in fact not be possible.