Overleaf - The online platform for scientific writing. Overleaf is free: start writing now with one click. No sign-up required. Great on your iPad.
Decisionize - Simplify decision making in 3 easy steps
TeXstudio - TeXstudio is an integrated environment for writing LaTeX documents.
Flotsm - Anonymously seek opinions on everyday decisions
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Decision Jam - Make better decisions quickly with your team