MagicSpeller for REALbasic 1.6.8 for Mac can be downloaded from our website for free. The program lies within Developer Tools, more precisely Debugging Tools. This Mac application was originally produced by infiniteline studios.
From the developer:
Magicspeller for Realbasic is a collection of a REALbasic objects for use within the REALbasic development environment. MagicSpeller allows you to use a dialog-based spell check system as well as an inline system that checks spelling as you type. Both options provide a customizable number of suggested corrections that are automatically prioritized to maximize accuracy.
You may want to check out more Mac applications, such as TreknoBabble, RegExr or iConStruct, which might be similar to MagicSpeller for REALbasic.