Słownik Ortograficzny Polski is a comprehensive offline dictionary for the Polish language, developed by DarekK. The dictionary contains over 2.3 million words with inflections and offers suggestions for correct spelling. It also includes explanations for homophones (such as lód-lud) and common abbreviations.

One of the most significant advantages of this dictionary is that it does not require an internet connection to function. In version 2.0, the dictionary has been updated to include more complex phrases like "na pewno," "na razie," and "po południu" that people often misspell. The developer has also welcomed feedback on missing words and expressions.

Overall, Słownik Ortograficzny Polski is an excellent tool for anyone looking to improve their Polish spelling and vocabulary.