This (slightly sweet) pickled carrot recipe is always a hit: http://www.epicurious.com/recipes/recipe_views/views/108763
So are the spicy snap peas:
That snap pea recipe is from the Joy of Pickling and they have lots of great recipes. I will see what I can dig up later. I never do the whole canning process; I just do a "quick pickle," no matter what the recipe says, and put the jars in the fridge...they last a long time.
I really enjoy The Complete Book of Small-Batch Preserving by Ellie Topp and Margaret Howard. Everything I've made from this book has been successful, and the batch size is small enough that if you don't like the finished product you aren't overwhelmed with unwanted bottles. I've also been happy with Helen Whitty's book Fancy Pantry. Both of these books have recipes for jams/jellies/preserves and other misc stuff as well as pickles.
I made a lot of great pickles and preserves last summer using Margie Jensen's Blue Ribbon Jams and Jellies, Pickles and Relishes. Every single prize winning recipe I tried came out wonderfully, especially the pickled green beans and bread and butter pickles. Unfortunately all my cookbooks are packed in boxes after a move so I don't have access to the recipes. If you can find one on-line get it.