WP User Manager - The most customizable profiles, community builder and membership WordPress plugin
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.
Jetpack - Jetpack offers SEO and security plugins for Wordpress.
WebshopLogic WP Google Search - Free plugin for integrating Google Custom Search box into your WordPress website without coding.
UpStream Plugin - UpStream Plugin is a free-to-use project management plugin that allows you to manage various types of projects right from your WordPress site.
SearchWP - Instantly improve the search experience of your WordPress site today with SearchWP, the best WordPress search plugin you can find!