iOS

Warning: Apple iOS devices are affected by PRISM. Using them may compromise your privacy. We strongly recommend replacing your iOS device with an Android-compatible device running Replicant.

Authentication
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Authy
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Gmail
Microsoft Outlook
Yahoo Mail
Yandex.Mail
Enterprise Suite
Notes
The enterprise suite category is for solutions for organizations that cover more than 10 categories in an integrated fashion (ex.: logins work throughout all apps, etc.)
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G Suite
Office 365
Zoho Office Suite
File Storage & Sync
Notes

Why not MEGA? While MEGA is free as in beer, the software is proprietary code.

Why not SpiderOak? SpiderOak is proprietary software.

Why not Tarsnap? Tarsnap is partially proprietary and hosts your data on Amazon Web Services.

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Dropbox
Google Drive
iCloud
Microsoft OneDrive
Yandex.Disk
Quikmesajado
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Discord
Facebook Messenger
Google Hangouts
LINE
Skype
Snapchat
Telegram
Tencent QQ
Viber Messenger
WeChat
WhatsApp
Mesh Networks
Notes

A mesh network is a decentralized peer-to-peer network, with user-controlled physical links that are usually wireless.

“Mesh networking (topology) is a type of networking where each node must not only capture and disseminate its own data, but also serve as a relay for other nodes, that is, it must collaborate to propagate the data in the network.“

Wikipedia

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Google News
Productivity
Notes

Riseup also offers email, XMPP, chat and data hosting (via Up1) services, all of which are accessible through Tor Hidden Service addresses. The list of these addresses is available here.

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Doodle
Evernote
Google Docs
Microsoft Outlook
Zoho Docs
Web Browsers
Notes

Use a combination of Tor Browser and a free web browser of your choice to the surf the web.

Try to use Tor Browser as often as possible. Browsing is slower with Tor, but far more secure.

Note: Mozilla Firefox is technically not completely free software, as Mozilla recommends non-free add-ons on their website.

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Google Chrome
Opera
Safari
Yandex.Browser
Serchado en la Interreto
Notes

DuckDuckGo is a software-as-a-service (SaaS) hosted around the world that provides you with anonymous search results from these sources. DDG open source components are available here.

There is also a DuckDuckGo hidden service at 3g2upl4pq6kufc4m.onion for Tor users.

MetaGer is a SaaS by the German non-profit SUMA e.V. that provides you with anonymous meta search results.

Startpage is a SaaS hosted in the USA and the Netherlands that provides you with anonymous Google search and image results through a free proxy.

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Google Search
Microsoft Bing
Yahoo Search
Yandex