Here are some useful sites and apps that you might enjoy for your Starfinder game!
A Facebook group dedicated to this site, and the fans of it, as well as a place to talk about or request site features, or corrections.
Read the Starfinder forums via Paizo.com.
Read up on rules clarifications and corrections for Starfinder via Paizo.com.
Join the Organized Play Network for Starfinder via Paizo.com.
The Starship Builder for Starfinder RPG
PCGen helps you build characters for role-playing games like Pathfinder and D&D. It’s like a character sheet that handles all the tricky and tedious parts of building characters. You can use it to build one character for yourself or to keep track of a dozen NPCs for a game world. PCGen is a volunteer project, so it’s free of charge and always will be.
D20PRO is a multi-platform, multi-player Virtual Tabletop (VTT) that takes roleplaying games from around the table to gamers around the world. Experience all the elements of roleplaying with the powerful D20PRO rules engine — speed up combat, roll a natural 20 on integrated dice, play on gigantic gaming maps, and bring character sheets to life. D20PRO specializes in running d20 3.5 and Pathfinder Roleplaying Game sessions, but easily handles any roleplaying game system!