Grammarly - Clear, effective, mistake-free writing everywhere you type.
Subtly - Learn English with smart subtitles on movies and TV shows
GrammarChecker.net - Grammar Checker is an online spell check tool. It effectively works on English sentence correction, Punctuation mistakes of 28 other different languages.
BoldVoice - Accent coaching app for non-native English speakers
LanguageTool - Free proofreading tool for OpenOffice, LibreOffice, Firefox, and Chrome.
Talk to Ri - 🚀App for tech specialists to learn English