Transparent Technic elements I know these Technic liftarms come in clear transparent:

https://www.bricklink.com/v2/catalog/catalogitem.page?P=32278#T=S&amp;C=12



https://www.bricklink.com/v2/catalog/catalogitem.page?P=32009#T=S&amp;C=12



These liftarms come in a couple of transparent colors (not clear transparent):

https://www.bricklink.com/v2/catalog/catalogitem.page?P=32348#T=S&amp;C=15



https://www.bricklink.com/v2/catalog/catalogitem.page?P=32449#T=S&amp;C=15



Also this connector comes in transparent

https://www.bricklink.com/v2/catalog/catalogitem.page?P=32016#T=S&amp;C=12



And these connectors come in transparent red 

https://www.bricklink.com/v2/catalog/catalogitem.page?P=6538b#T=S&amp;C=17



https://www.bricklink.com/v2/catalog/catalogitem.page?P=32013#T=S&amp;C=17



Are there any other liftarms, connectors or Technic elements in general that come in transparent colors?
There are far more parts within Technic category in Transparent colors and just too many parts to list them all. I suggest checking Color Guide on BrickLink, Transparent Colors section and pick first column (named Parts) Most of the colors have Technic bits in colors you are interested in.

For example, just Trans-Clear color has 23 items under various Technic categories.