GnuPG - GnuPG is a complete and free implementation of the OpenPGP standard as defined by RFC4880 (also known as PGP).
Unit Converter Ultimate - A simple, lightweight, Material Design themed unit converter for Android.
Kleopatra - Kleopatra is a certificate manager and GUI for GnuPG.
OneConvert - OneConvert - fast online calculator and free file converter. Allows to convert different file formats and allows quick and accurate conversion between many units of measure.
PGP Tool - PGPTool allows you to encrypt and decrypt files. It's free and easy to use.
Tweetbot - Sync your timeline across your iPhone, iPad, and Mac. Mute tweets by user, hashtag, tweet source, or keywords (including regex). 3rd Party support for image, video, read later, and timeline sync services.