Gambits similar to the DDG

There is not much analysis here: the idea is to give a short summary of gambits similar to the DDG. Only the DDG-like variations, if any, are described.

Alapin French 1. e4 e6 2. d4 d5 3. Be3
Albin Counter-Gambit 1. d4 d5 2. c4 e5 ("DDG Reversed")
Blackmar-Diemer 1. d4 d5 2. e4 dxe4 3. Nc3 Nf6 4. f3
Caro-Kann DDG 1. e4 c6 2. d4 d5 3. c4
Winckelmann-Reimer 1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. a3 Bxc3+ 5. bxc3 dxe4 6. f3
Rare 1. d4 gambits 1. d4 Nf6 2. f3 d5 3. e4 dxe4 4. c4 and 1. d4 d5 2. e4 dxe4 3. c4