Yes - I use pure instead of butter marge and replace an egg with soya flour or chickpea (gram) flour. The vegan society recommends:
Egg Substitutes
Eggs are used to bind a dish and, when whipped, may also incorporate air making a cake or pudding very light. Vegan egg replacement powders are available from health food shops. This can be useful, especially for tricky foods like meringues. However, many recipes can be adapted using one of the suggestions below. Just remember to bear in mind the final dish- you can't use banana as a substitute when making a quiche!
Instead of 1 egg, you can use...
1 tbsp gram (chick pea) or soya flour and 1 tbsp water
1 tbsp arrowroot, 1 tbsp soya flour and 2 tbsp water
2 tbsp flour, 1/2 tbsp shortening, 1/2 tsp baking powder and 2 tsp water
50g tofu blended with the liquid portion of the recipe
1/2 large banana, mashed
50 ml white sauce
tips on raising agents...
use self raising flour
add extra oil and raising agent (e.g. baking powder)
use about 2 heaped tsp baking powder per cake
instead of baking powder, use 3/4 tsp bicarbonate of soda and 1 dssp cider vinegar (good for chocolate cakes)
try sieving the flour and dry ingredients, then gently folding in the liquid to trap air
alternative binding agents...
soya milk
soya dessert (vanilla, chocolate, strawberry...)
custard (see below)
mashed banana
plain silken tofu
soya cream
sweet white sauce (soya milk, vegan margarine, sugar and cornflour)
agar agar