$ – Preply is a global educational platform which offers online tutoring for anyone who wants to improve language skills, programming language, learn a new hobby or improve knowledge of some academic subjects.
$ – NaTakallam pairs displaced persons (refugees) with language learners around the world for language practice over Skype.
$ – 1-on-1 lessons with native speakers (via Skype, etc.) I love iTalki and use it for my weekly language lessons and speaking practice. (affiliate link)