BetterHandles

BetterHandles ia an Adobe Illustrator tool for creating and editing curve handles.
If you work with curves in Illustrator, you need BetterHandles:

-Select multiple handles, and collectively move, extend, rotate, or retract them
-Extend or retract handles without changing their angles
-Copy and paste handles
-Edit points numerically: anchor, in handle, out handle
-Convert multiple points from corner to Smooth or vice versa
-Automatically extend new handles on multiple points
-Intuitively reshape path segments, optionally constraining handle directions
-Use slow-drag to divide the cursor Movement for extremely precise moves
-Equalize a point's handles
-See all the handles on a path while editing it
-Split a path at one or more points
-Delete one or more points and close The Path around them
-Remove all redundant points on multiple paths
-See when the cursor is over a handle, point, or path — without having to use SMART Guides

Version 1.4 (30 July 2010)

* Now fully compatible with Illustrator CS5 on both platforms
* New feature: Smart Remove points will attempt to keep the shape of the curve as close as possible to the original after removing one or more points from the path
* New feature: You can now add automatically add points to the currently selected path(s) at their horizontal and vertical tangencies
* New feature: Connector points (points between straight segments and curved segments) can be recognized and their handles automatically kept in alignment
* New feature: You can now automatically close all selected open paths, optionally honoring any existing endpoint handles
* Improvement: With Smart Guides off, the snap radius for anchor points and handles now matches the value set in Illustrator Preferences > Selection & Anchor Display > Selection > Tolerance
* Improvement: After entering a new value in one of the single point fields on the palette, the tab key will automatically Highlight the next field