GEP - GLOBAL LEADER IN DIGITAL PROCUREMENT & SUPPLY CHAIN SOLUTIONS
Quip - Quip is the modern productivity suite that simplifies your life and helps your team get work done faster.
Ariba - Ariba is a software and information technology services platform providing companies with collaborative business commerce solutions.
Google Docs - Create a new document and edit with others at the same time -- from your computer, phone or tablet. Get stuff done with or without an internet connection. Use Docs to edit Word files. Free from Google.
oboloo - Procurement Made Simple - Automate Your business processes with oboloo's user-friendly Procurement e-Sourcing, Contract, Supplier and Savings Management Software.
Trello - Infinitely flexible. Incredibly easy to use. Great mobile apps. It's free. Trello keeps track of everything, from the big picture to the minute details.