OpenSearch - OpenSearch is a community-driven, open source search and analytics suite derived from Apache 2.0 licensed Elasticsearch 7.10.2 & Kibana 7.10.2. It consists of a search engine daemon, and a visualization and user interface, OpenSearch Dashboards.
Reminder - A better way to keep track of your reminders 📝
Sphinx Search - Sphinx is an open source full text search server, designed with performance, relevance (search quality), and integration simplicity in mind. Sphinx lets you either batch index and search data stored in files, an SQL database, NoSQL storage.
Wonder - Your personal research assistant
Apache Lucene - High-performance, full-featured text search engine library written entirely in Java.
Later Reminders - Super simple way to schedule reminders on your phone