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.
botwick - Build your own SMS-based text bot
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.
Alex WikiMessenger Bot - A Wikipedia bot for messenger
Apache Lucene - High-performance, full-featured text search engine library written entirely in Java.
Abot for Slack - Trusted by over 1000 Slack teams ✅. Abot is a simple and highly configurable app for anonymous feedback messages and more. If you want to create a poll on Slack or use it as an anonymous suggestion box you just need to type a simple command.