Moribund Shares

[Segilla]

I've 3 shares that I want to ditch. One is a delisted AIM, another now traded only in Vienna and the other worth very little with probably no prospects.
It's not clear if these are costing me money just to be in my Hargreaves Lansdown account. I want to leave HL but clearly don't want to pay to transfer these shares to a new provider.

Has anyone experience of gifting shares to a charity? Maybe they would not be interested in all of them. If not how can I rid myself of them?

TKS