I always think about free collage maker online. Most of the software are very advanced or need to download and install. So I made this online app to easily make quotes, jokes and any greeting cards like designs.
How it works
It is very simple. Just upload your photos and scale, rotate or move them as you want. Fill background by color, gradient or another photo. Add text with inbuilt fonts or you can use custom fonts. Add some freehand drawings, cliparts etc. Some advanced features like remove unwanted parts of photo, adding effects or distorting are also present. You can save your design as a json file which can be restored later.
What I learned
I have learned new way of accomplishing large projects by splitting into smaller modules so that debugging and adding new features in the future is very easy. The Requirejs library is the one that I use in most of my large software projects.