dpoakaspine

Gets rid of the new tab on editing. Makes editing posts a little easier.

WP Better Edit

Gets rid of the new tab on editing. Makes editing posts a little easier.

Applelo

This plugin improves the admin users search. Just configure what datas you need to search (or not) and that all 🙂 
You can choose to configure what default wordpress search (login, url, email, nicename, display_name) and extends search with user metas (last_name, first_name…).
Free tip: this plugin do more sense with <a href="https://wordpress.org/plugins/codepress-admin-columns/" rel="ugc">Admin Columns</a> 😉

WP Better Edit vs Better Admin Users Search