SmallDevTools - Handy developer tools with a delightful interface
Todoist - Todoist is a to-do list that helps you get organized, at work and in life.
LaunchKit - Open Source - A popular suite of developer tools, now 100% open source.
Evernote - Bring your life's work together in one digital workspace. Evernote is the place to collect inspirational ideas, write meaningful words, and move your important projects forward.
Profitable developer tools database - A database of 103+ hand-curated profitable developer tools
OneNote - Get the OneNote app for free on your tablet, phone, and computer, so you can capture your ideas and to-do lists in one place wherever you are. Or try OneNote with Office for free.