There are several good, free, resources online where you can pick up some new stuff for your Starcraft Arsenal. Below we mention some of them, but remember, there are so many more if you look around a bit.
Furious Paul’s guide
Furious Pauls guide is nowadays a free resource that covers the three different races, some specific rush strategies and some more general unit composition strategies. What is good with this guide, even if it doesn’t cover the expansions it is that it got strategies for all the different matchups.
As a fun bonus Furious Paul covers some more casual aspects of Starcraft II like team game strategies, FFA-strategies Starcraft 2 Wings of Liberty Campaign.
The guides are easily found at https://www.furiouspaul.com/pc/starcraft2/ . The design looks like it’s made in 2001 and not 2012 but don’t let that scare you, the importance is that the guides are ok.
Another resource is the Icy-Veins website where you can find a lot of patch discussions, general Starcraft news and a great podcast! We really appreciate the fact that a Starcraft podcast exist since it enables you to think and spend time on Starcraft during the entire day. It’s a perfect way to end a hard work-day on the ladder and slow things down a bit before you go to sleep. The podcast is available at: https://www.icy-veins.com/sc2/ .
Osiris SC2 Guide
We have not tried this resource ourselves which means we can’t really say to much regarding the quality of it. However, it is one of the resources still out there. Its updated for Heart of the Swarm but unfortunately it looks that they do not cover the Legacy of the Void expansion. Anyway, the guide is found at: http://www.osirissc2guide.com/