WPMUdev by alvarogois
http://premium.wpmudev.org/blog/powerful-must-have-tools-for-every-wordpress-developer/
WordPress.org plugins
Advanced Custom Fields (ACF®)
by WP Engine
updated today
69.2 million downloads
2 million active installs
Rating: 90 / 100 (1429 ratings)
User Switching
by John Blackbourn
updated 42 days ago
5.6 million downloads
200,000 active installs
Rating: 98 / 100 (238 ratings)
Regenerate Thumbnails
by Alex Mills
updated 232 days ago
22.6 million downloads
1 million active installs
Rating: 92 / 100 (395 ratings)
Theme Check
by WordPress.org
updated 842 days ago
2.5 million downloads
20,000 active installs
Rating: 96 / 100 (195 ratings)
Developer
by Automattic
updated 3054 days ago
203,312 downloads
900 active installs
Rating: 94 / 100 (18 ratings)
Monster Widget
by Automattic
updated 3072 days ago
160,805 downloads
1,000 active installs
Rating: 100 / 100 (8 ratings)
Woocommerce Monster Widget
by alispx
updated 3854 days ago
4,993 downloads
10 active installs
Rating: 100 / 100 (2 ratings)
Custom plugins
There are no custom plugins in this collection.