just some wordpress plugins that I like and use
Anti-spam, used for contact forms.
Easy Updates Manager
Allows you to set update logic or disable individually, per plugin or theme.
Enable Media Replace
For conveniently updating assets in the Media Library.
EWWW Image Optimizer
Optimizes images automatically.
A great companion to Gravity Forms; allows you to set up complex routing and conditional workflows with your forms.
The best forms package around; my favorite plugin due to its extensibility.
This and Wordfence are both good, but I like the interface for iThemes Security better.
Free analytics alternative to Google.
Prevent Browser Caching
Very useful for debugging and testing new code.
Automatic code formatting for displaying to the front-end.
Allows the uploading of SVG files to the media library.