Organic Maps is a free Android & iOS offline maps app for travelers, tourists, hikers, drivers and cyclists based on OpenStreetMap data created by the community. It is a privacy-focused, open-source fork of Maps.me app (previously known as MapsWithMe), maintained by the same people who created MapsWithMe in 2011.
Organic Maps is one of the few applications nowadays that supports 100% of features without an active Internet connection. Install Organic Maps, download maps, throw away your SIM card, and go for a weeklong trip on a single battery charge without any byte sent to the network.
It looks like there is also a desktop version.
ProofMode is an open-source project developed by Guardian Project, Okthanks and WITNESS.
We believe in a future, where every camera will have a “Proof Mode” that can be enabled and every viewer an ability to verify-then-trust what they are seeing. ProofMode is a system that enables authentication and verification of multimedia content, particularly captured on a smartphone, from point of capture at the source to viewing by a recipient. It utilizes enhanced sensor-driven metadata, hardware fingerprinting, cryptographic signing, and third-party notaries to enable a pseudonymous, decentralized approach to the need for chain-of-custody and “proof” by both activists and everyday people alike.
A few years ago I noticed that most of the unit converters on the digital stores were ugly, not immediately usable, with ads and tracking software. I thought it would be a good idea to develop Converter NOW in order to solve all these problems!
It is made to be easy, fast and immediately useable: just start typing and immediately you have the real-time conversion with all the other units of measurement. It is customizable: the units can be reorganized according to your priorities and your use case. It integrates a Calculator that let you do the calculations in every page.
Currency conversions are updated daily. Choose your favourite dark or light theme. Full Smartphone, Tablet and Web app support. It is free, no ads, no analytics, no permissions (just Internet to update currency conversions). And first of all it is open source!
Online demo site: https://converter-now.web.app/
PiRogue tool suite (PTS) is an open-source tool suite that provides a comprehensive mobile forensic and network traffic analysis platform targeting mobile devices both Android and iOS, internet of things devices (devices that are connected to the user mobile apps), and in general any device using wi-fi to connect to the Internet.
Mobile Verification Toolkit (MVT) is a collection of utilities to simplify and automate the process of gathering forensic traces helpful to identify a potential compromise of Android and iOS devices.
It has been developed and released by the Amnesty International Security Lab in July 2021 in the context of the Pegasus project along with a technical forensic methodology and forensic evidences.
Warning: this tool has been released as a forensic tool for a technical audience. Using it requires some technical skills such as understanding basics of forensic analysis and using command line tools.
Record or upload high-quality audio, host unlimited episodes, and distribute everywhere with just one click. Whether you’re a beginner or a seasoned pro, there’s never been a better way to podcast. Supports web browsers, iOS, and Android devices. Record anywhere. Distributed teams. Can support callers to the show, too. Has a visual editor for recorded material. Upload existing audio files to mix into the recordings.
Write your apps in Python and release them for iOS, Android, Windows, MacOS, Linux, Web, and tvOS using rich, native user interfaces. One codebase. Multiple apps.
Github: https://github.com/beeware/
You can write native code in Go for Android and iOS.
Securing an iPhone to protect it for travel.
Pushover is a pushnotification site that just gives you an API to work with and a near-universal app that runs on Android or iOS. Add realtime notification to whatever you want with nearly no work. The app's free for a week; after that you have to pay $5us for a perpetual license. You also get 7500 notifications per month per integration.
A personal webapp for tracking your own location. Lets you set up a private location diary or a realtime tracker to share with people you give access to. A phone app for iOS and android is the user front-end. The app can publish GPS coordinates and your phone's status to an arbitrary HTTP API endpoint or MQTT broker if you tell it to. Your location gets plotted on a map. The back-end is called Recorder and is found on github: https://github.com/owntracks/recorder
A crowdsourcing service which lets lets people who are visually impaired call for visual assistance from their smartphones.