Chrome Music Lab
Sight Reading Factory
An incredible site for learning how to sight read sheet music. Free plan offers many levels of exercises. To start out select “Voice” as your instrument and then “Alto”, set time signature to 4/4 and key to C Major. Start with difficulty level 1. Unlimited paid plan is $35 per year.
Online music notation software. Ability to share your compositions with others. Free account gets storage for 15 scores. Monthly, yearly and lifetime membership plans available for more storage and features. Lifetime membership plan usually is highly discounted on Black Friday each year.