dspell is a rudimentary spell checker written in python as an educational exercise in natural language processing. It's only dependency is the nltk. It can be run by executing any of the following from the dspell directory:

./sp_correct.py str "your string to correct"
./sp_correct.py file /path/to/your/file
./sp_correct.py dir /path/to/your/dir

Due to the slow speed of the algorithm, running dspell on data of sizes beyond single sentences is not recommended.