General Tools

Tool	Description
StackBit	Build JAMStack sites just under minutes
Expo	App Building Toolchain, based on React Native
Framer	App Prototyping Tool
Material Design Color Tool	Create, share, and apply color palettes
AppWrite	Open source backend server
Octopus	a lightning-fast visual sitemap builder
GitFolio	personal website + blog for every github user
CodeFactor	Automated code review for git
Depfu	automated dependency updates
SonarCloud	Analyze your public repo for free
BundlePhobia	find the cost of adding a npm package to your bundle, or just scan your `package.json`
Responsively	Open source modified web browser that helps in responsive web development.
Ninite	Install and Update All Your Programs at Once
BleachBit	Clean Your System and Free Disk Space

Diagrams, Rough Prototyping

Tool	Description
Diagrams	My favorite tool to make flowcharts and diagrams. I recommend to install the desktop version if you have unstable connections.
JamBoard	digital interactive whiteboard developed by Google
Excalidraw	hand drawn & feel
Mermaid.live	Flowchart & Diagrams editor