Workflowy - A better way to organize your mind.
Algolia - Algolia's Search API makes it easy to deliver a great search experience in your apps & websites. Algolia Search provides hosted full-text, numerical, faceted and geolocalized search.
Dynalist - Dynalist is a web app that lets you break down and organize your thoughts in the format of lists.
Google Custom Search - Google Custom Search enables you to create a search engine for your website, your blog, or a collection of websites.
SuperNotecard - Introducing SuperNotecard. SuperNotecard is an online writing tool that features virtual notecards to help arrange facts or scenes, track details, organize paragraphs, and clarify your composition process.
ElasticSearch - Elasticsearch is an open source, distributed, RESTful search engine.