Copy (15 GB free)
Fast, simple and lots of free space. I like it.
Box (10 GB free)
Intended for Business Users it is not the fastest but a reliable cloud service. Best is: The often have promos that give you 50GB for free.
Cubby (5 GB free)
Cubby is the option to go for if you want to share existing folders. I use it for sharing dev-files (e.g. //localhost) that need to be in a specific place and change constantly.
Dropbox (2GB free)
Well, Dropbox ist still Dropbox – expensive, but widely used
filezilla – The FTP client I use
Netbeans IDE is a free and open source development plattform to build web applications.
Google Analytics: THE web analytics platform
Piwik – Free an Open Source alternative to Google Analytics
Mixpanel – User centric tracking based on events; free with limitations
Optimizely – A/B Testing, affordable and easy to manage
CrazyEgg – Heatmap Tool, free with limitations
ClickHeat – Free an Open Source alternative to Crazy Egg
Google Tag Manager – What else?