WebTechee

When you click an anchor link (#section), sticky headers hide content. 
This plugin adjusts scroll position so the anchored section is fully visible.

Sticky Header Anchor Fixer

Fixes anchor jumps hidden under sticky headers.

philiprabbett

This plugin will animate a regular anchor navigation with a smooth scrolling effect.
Each time a link is clicked, the whole screen will gradually scroll to the targeted element, instead of “jumping” as it’d normally do.
jQuery.ScrollTo is used for the animation.

WP LocalScroll

This plugin will animate a regular anchor navigation with a smooth scrolling effect.

Sticky Header Anchor Fixer vs WP LocalScroll