Creative Market - Buy and sell handcrafted, mousemade design content like vector patterns, icons, photoshop brushes, fonts and more at Creative Market.
Pushover - Real-time notifications on your Android, iPhone, iPad, and Desktop
SocialSizes - Sketch templates for sharing images & videos on social media
Pushbullet - Pushbullet - Your devices working better together
UI/UX Assets - Curated UI kits, wireframes, templates, icons and more.
Gotify - a simple self-hosted server for sending and receiving messages