D2D may refer to:
Technology Device-to-device, proximity-based direct communications between mobile nodes orchestrated by the cellular operator Direct2D, a hardware-accelerated 2D API built on top of Direct3D 10 Direct2Drive, an online video game and entertainment distributor and retail store
Other uses Door-to-door, a sales or political technique for engaging an audience Dot to Dot Festival, a music festival in the United Kingdom Delhi 2 Dublin, a Canadian world music band