Preserving pan
Not essential for curds, but a good pan will last a lifetime of use when jam making. Select a heavy aluminum, or stainless steel type. The problem with using a large saucepan is that when boiling for a set some jams will foam over, causing a loss of mixture. Plus it will make a mess of your cooker. If you make vinegar preserves you must never use the equipment for jam making, as cross contamination will spoil the flavour.
Thermometer
Another item that is not essential, used to test the setting temperature of the preserve. Sold as 'Sugar Thermometer'.
Jelly bag
To strain fruit juices, kitchen sieves are too coarse, the fine mesh of muslin is good but can be awkward to set up. Commercial jelly bag stands are available.
Jam funnel
Also called 'Jar Funnel' used to fill jars without spilling.
Spoons
Wooden spoons are a popular choice for most stirring work. A large slotted flat pan spoon is useful for skimming scum or stones.
Timer
Countdown kitchen timer with alarm is used for ensuring correct cooking and setting times.
Tongs
Kitchen tongs are useful for removing whole fruit when scalding or removing jars from hot water.