Libraries all around

The second question I would like to stop on in my startup journey are libraries. Not the paper ones this time, but software components we are so dependent on.
So what we wouldn't be where we are without:

• Leaflet and its plugins for maps: leafletjs.com/ ! Free, stable, and so pleaseant to use!
• i18next for translations. Nice!
• jstorage - good wrapper for HTML client storage stuff
• toastr - simply cool
• Carousels.... Still a tough question - looking for perfection.
• JQuery, JQuery UI and its plugins,  and all the standard stuff

Integration libraries or Web API, to be moved to separate article: facebook, google, panoramio,