A
Align and Distribute: A dialog box with plenty of actions to align both objects and paths.
B
Box Tool: A unique tool that's used to create 3D boxes by adjusting all 3 dimensions of the box.Break Apart: A path option that can separate a collection of paths, even if they were combined.

Bucket Tool: A tool that can fill the area of a shape or paths with a color.
C
Calligraphy Tool: A drawing tool that has a ton of options to create advanced brush strokes.
Clone: A edit option that creates a dynamic copy of a selected object. If the original object is altered, so will the clone.
Combine: A path operation that groups the selected paths to make one entire object that inherits a single fill and stroke.
Create Tiled Clones: A very useful menu with tons of options for creating large amounts of identical, yet dynamic objects.
D
Distribute: A series of options in Align and Distribute that evenly space out multiple objects.Dropper Tool: A tool that can find the exact color of the selected pixel or pixel area.
Duplicate: An edit option that makes an exact duplicate of your object in the same position as the original.

E
Ellipse Tool: An essential tool that creates circles, ellipses, and arcs.Eraser Tool: A tool that can be used to delete or cut out nodes.
Export Bitmap: A file option that allows you to export your artwork as a PNG bitmap file.

F
Fill and Stroke: An essential dialog box that contains styling options such as fill color and stroke style.Filters: A drop-down menu that has many different filters and effects to enhance your drawings.

G
Gradient Tool: A tool that allows you to edit color and positioning of gradients.
H
Handles: A visual representation of paths and bezier curves that can be dragged to manipulate the nodes that make them up.
I
Isometric Projection: A unique art style that involves a 3D art style at a particular angle.
J
Join Style: A fill and stroke option that adjusts the appearance of a joined node.K
Kerning: A text option that adjusts the letter spacing of each specific letter of a text object.
L
Layer: A drop-down menu that contains everything you need to keep your layers organized.
M
Markers: A stroke style option that allows shapes to be assigned to start, middle, and end nodes.
N
Nodes: The basis of all vector design, but Inkscape has a few unique tricks on these.
O
Objects to Marker: An object option that allows you to use any custom object as a marker.
P
Path Effect Editor: A powerful menu that has many advanced options for altering the appearance of paths, such as tapered lines and envelopes.Pen Tool: A vital tool that easily creates paths by clicking to create nodes. It's also used for creating bezier curves.
Pencil Tool: A tool that's used mostly to create freehand paths and nodes.
Polygon Tool: A tool that makes drawing polygons and stars a breeze.

Q
Quadrilateral Distortion: A fancy term for the useful Extensions > Modify Path > Envelope that allows the distortion of all sides of a selected path.R
Rectangle Tool: An essential tool that creates rectangles along with the ability to have rounded corners.Repeating Patterns: It's very easy to create large amounts of identical, yet dynamic objects, such as patterns.

S
Shadows and Glows: A filter menu options that contains a variety of shadows and glows for objects and paths.Spiral Tool: An interesting tool that draws spirals from a surprising amount of options.
Spray Tool: A great tool that can create multiple copies or clones of an object by spraying an area.

T
Tapered Lines: A style of line that tapers in one or both directions, and Inkscape has a few ways to do them.
Tweak Tool: A fun tool that has different methods of sculpting objects and paths, including shrinking and expanding.
U
Ungroup: An object option that simply ungroups your grouped objects.
V
Visualize Path: A unique extension that offers four different options to generate drawings based on the selected paths.
W
Warping: One feature from using the Tweak tool that can warp a selected object or path just by dragging it.