This can help, but will help more overall is communication with your partner(s). Talk about what both of you are interested; the sling is a great start, but will only take you so far. Try adding pillows under your (or your partner's) back, hips, etc, to try different angles. What about being bent over the bed? If you're really adventurous, Eden has a couple of swing options...I know I want one eventually!

Good luck

-Essin' Em

Essin' Em has is right on with communication! You can buy slings and furniture but if your partner isn't up for it, it will be a waste.

Additionally, we could probably give you better suggestions if you tell us what you have done. Maybe you've only done missionary and all our suggestions will be something new or maybe you're fairly experienced and none will.

Also, if you want positions for oral, anal, fingering, etc, they'll be different than positions for vagina intercourse.

Still, here's some ideas.
Girl on Top (cowgirl)
Reverse cowgirl
CAT (coital alignment technique, more than just a position)
Doggy (on all fours)
Froggy (similar to doggy but with the female's upper half down on the bed)
Lean over a couch, the bed, chair arm
She perches at the edge of the bed, he stands. Her legs can be up against his chest or around his waist
Female faces forward on top, her legs going forward with knees slightly bent so her feet rest under the guy's arms
Lie on your sides, facing eachother. Her top leg goes over his hips, his top leg goes between hers, his bottom leg is the bottom. Rock back and forth.
Both on the sides, similar to spooning. he puts his top leg between hers, her top leg can go in the air or knee bends to go around his leg. We do a variation of this where we're more perpendicular
Her on the end of the bed, him penetrating while standing up, her legs over his shoulder
Girl on bottom, guy kneeling in front. Her legs bend over his thighs, her hips rise slightly to meet him
Girl on bottom, one of both legs up against his chest/over his shoulder. Take it further, both legs up, he leans forward to that her legs touch her body

im just curious about what else it could be potentially used for...

Sounds pretty versatile.