Lesser-known resources that can assist UPSC preparation include online forums, mobile applications, and niche educational websites. Platforms like Quora and Reddit provide community support and various viewpoints on study techniques and resources. Specialized mobile apps can facilitate revision and offer quizzes, integrating technology into study routines. Moreover, lesser-utilized government publications and reports, such as Economic Surveys and Budget Documents, can provide essential insights into current policies and macroeconomic trends, thereby enriching candidates' understanding of the syllabus.