Meazure - What are the dimensions of that image? How big is this window?

Cryptee - Cryptee is a safety and privacy focused, encrypted and cross-platform personal data storage service. You can write personal documents, notes, journals, store photos and all sorts of other files.

ScreenRuler - ScreenRuler lets you measure objects on your Ubuntu desktop using six different metrics.

SocialVault - Decentralized, encrypted storage and browser for your Facebook data.

Bluegrams Screen Ruler - A lightweight and configurable ruler tool for Windows Desktop.

Tresorit - Encrypted cloud storage for your confidential files. Using Tresorit, files are encrypted before being uploaded to the cloud. Start encrypting files for free.