craigslist - craigslist provides local classifieds and forums for jobs, housing, for sale, services, local community, and events
Zorbi - Spaced-Repetition Flashcards - Other tools are built by boomers, Zorbi is built by students.
Yclas - The Most Suitable Classifieds Website Platform No advanced knowledge needed to have a classifieds website ready to start immediately Simple way to start a
SmartCards+ - Spaced Repetition Software for iOS. Modern, powerful and easy to use.
OsClass - Open-source PHP classifieds script to create classifieds website within 3 minutes.
Mochi - Write notes and flashcards with Markdown and study them with spaced repetition.