Klib is described as '(Kindle library) offers a new way to manage Kindle highlights and notes to help you to gain more from reading' and is an app in the Education & Reference category. There are four alternatives to Klib for Online / Web-based, Google Chrome, iPhone and Amazon Kindle. The best alternative is Readwise. It's not free, so if you're looking for a free alternative, you could try Saveread.io or Booky.
Clippings.io offers an easy way to your organize your Kindle notes and highlights. FEATURES - Import the annotations made on your Kindle Paperwhite, Kindle Touch, Kindle DX, Kindle Keyboard and Kindle Fire.