Other online resources

Awesome list of awesome lists

https://github.com/sindresorhus/awesome

For every tech topic there is an Awesome <INSERT-TECH-HERE> page full of useful stuff. This is a list of those lists.

Awesome OSS alternatives to SaaS products

https://github.com/RunaCapital/awesome-oss-alternatives

Stacks on a budget

https://github.com/255kb/stack-on-a-budget

A collection of services with great free tiers for developers on a budget.