A few strong starting points across Yantrakosha.
FreeAudioKit
FreeBMIKit
FreeBrandKit
FreeBudgetKit
8 free online tools in this category. All free, no sign-up required.
8 tools
Citation Generator & Bibliography Maker
Education
Flashcard Maker & Study Tool
Free Browser Games Collection
Online Music Tools & Instruments
Quiz Maker, Templates & Flashcard Quizzes
Free IQ, Personality, Reaction & Memory Tests
Free Educational Worksheet Generator
BMI, Pregnancy, Ovulation & Sleep Calculator