A modular tool tray organizer is composed of a plurality of rectilinear shaped base panels, each having side edges and a top surface. At least one first male connector in the form of a blade projects from at least a first side edge of a first panel and at least female connector in the form a slot is formed in at least a second side edge on an adjacent panel for receiving the blade connector of the first base panel thereby to form a flat base for the tray of a desired size and shape.

An organization system may include a mount and an organization tray. The mount may include a structural interface configured to engage with a vertical structure to affix the mount to the vertical structure. The mount may also include a retention protrusion connected to the structural interface. The organization tray may comprise: (i) a base, (ii) a plurality of tray walls connected to the base, wherein the plurality of tray walls and the base define one or more compartments; and (iii) an engagement recess defined by or positioned on a tray wall of the plurality of tray walls, wherein the engagement recess is configured to receive and engage with the retention protrusion of the mount to selectively mount the organization tray to the vertical structure.

A portable case is for power accessories including wires. The portable case includes a housing having first and second sides, first and second ends extending between the first and second sides, and dividing walls extending between one or more of the first and second sides and the first and second ends. The dividing walls define compartments. The housing also includes floor panels respectively within the compartments. The portable case also includes aligned slot pairs carried by the dividing walls, and spindles respectively received by the aligned slot pairs, each spindle configured to receive a wire.