The highly talented Amy Moss at eatdrinkchic.com has created 8 wonderful down loadable label sets.

She's provided labels for Strawberry, Rhubarb, Apricot, Blueberry and Cherry Jams and also for Marmalade.

Click here for her home made jam packaging labels blog post.

If you're looking for vintage style labels then Suzee Que could have the answer. Have a look at her flikr photo stream for 20 similar designs.

The worldlabel blog has fillable printouts in pdf format for several popular label sizes which makes life even easier.

These ideas for packaging jam and other preserves would be great for gifts, they use vintage jars with labels using a simple font.
Vintage jars can be picked up in charity shops and flea markets, just make sure to carefully clean and steralise them before using.

If the jars don't have lids they can be sealed using waxed circles which, when placed directly onto the surface of the warm jam, create an airtight seal. The jar can then be finished off with a decorative paper jar cover.

These examples can be found on the  Country Living website.