PhotoDemon provides a powerful Curves tool with support for an unlimited number of nodes. Nodes can be added, moved, or removed via simple mouse clicks. An optional histogram, grid, and original curve overlay make it easy to find the right adjustment.
Like all PhotoDemon tools, it also provides a command bar that allows you to save and load custom presets, randomize its parameters, and reset to default values. Last-used settings are automatically saved and restored, and all changes provide a real-time preview (no click or mouse button release required).