Membership plugin ?

hey everyone I’m looking for a membership plugin that is decent and works solid, but I’m looking for one that will be able to send someone a program or file to download for them that they can only see when they’ve purchased the membership…

also i know im in the wrong place here to ask this most probably, its just i don’t know where to ask but any way i also want to make the program only work for the user who has purchased a subscription… i know that’d be a bit more confusing but I’d like to know if theres any tuts on how to do that also.

Sorry for the noob question / very unsorted paragraph ive had no sleep last night, but any help is welcome ??