1. Lectia! - Available on iOS and Android - contains authentic listening and reading resources
2. Duolingo - Available on desktop and iOS and Android
3. Memrise - Available on desktop and iOS and Andriod
www.conjuguemos.com - Sign in to review unit vocabulary & grammar concepts
www.studyspanish.com - free resource to practice Spanish
www.wordreference.com - An amazing online English-Spanish dictionary (not translator)
www.thespanishexperiment.com - free resource to practice Spanish
www.youtube.com/user/tontitofrito - link to Sr. Jordan videos on YouTube to review grammar concepts
http://personal.colby.edu/~bknelson/SLC/ - More grammar practice & some cultural modules
https://www.learnpracticalspanishonline.com/index.html - Videos to practice Spanish grammar & listening skills
https://www.kwiziq.com/ - Able to access many features with free account - variety of activities
I know this video is for Russian, but it has great advice