If you happen to have Swedish Roots there is online help available. I wish I could say it was free help but it isn't. However, when compared to a trip to Sweden, it is a bargain.
ArkiDigital has more than 56 million images that you can access including church records, court documents, military rolls, tax and census registers and estate inventories. The site catalog breaks down the country by counties and tells you what information is available right now for that county.
Of course, you need to know a little something for this to be helpful. Knowing where you family is from in Sweden is helpful. If you have Swedish roots, this is one that you need to visit.