Delta Chat is like Telegram or Whatsapp but without the tracking or central control. Delta Chat does not need your phone number. Uses the most massive and diverse open messaging system ever: the existing e-mail server network. Chat with anyone if you know their e-mail address, no need for them to install DeltaChat! All you need is a standard e-mail account. Full clients for multiple platforms available.

Github: https://github.com/deltachat/

Rewtro is a weird retro game engine inspired by fantasy consoles and code golf that runs games encoded in a very small amount of data (2kb/3kb). This way is possible to share games using exoteric and usually data inefficient ways: i.e. sticking some PWA magic and a QR-Code reader to the engine I've made a fake gaming console for mobile devices. Games are coded using JSON structures. Includes tools for more easily building such games.

Source code for the Gotify Android client application. Can also be installed from the Play or F-Droid stores.

Enter the BART station you're at and the one you want to go to, and it'll figure out how many stops you need to go backwards to get on the train going the right way in relative comfort.

Bookmark this on your phone.

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/

Build beautiful, responsive, readable interfaces. Lightweight, only 14k in size. Looks easy to use.

Personal media server. Kind of like Kodi, but you can use platform specific clients to access your media, just like you can from the television. Streams media as necessary. There's even an HTML5 client so you can use your web browser instead of an app or client. You can use Kodi as a client, too.

Github: https://github.com/MediaBrowser

You can write native code in Go for Android and iOS.

A personal storage server for storing blobs of data. Basically a dumptruck for posts, files, and whatnot. Search, brows, and visualize. Can be mounted as a file system using FUSE. Can back up socnet data. CLI and web UI.

Github repo: https://github.com/perkeep/perkeep

Homepage for a mobile application that lets you map to and validate Open Streetmaps satellite imint. Part of the Humanitarian Open Streetmap project.

Application for transferring files to mobile devices. Throws up a QRcode in a terminal and spawns a web server. Scan the code, download the file.

Give the web application on this site a URL, some text, a phone number, or an SMS code and it'll generated a 2d barcode called a QRcode, which you can save as a .png file to use as you like. Good for stickers, business cards, and other ways of making some data machine readable and scannable.

A set of HTML5 templates for making efficient, fast, and consistent web applications, including mobile support. Freely downloadable, with Github repository link. Comes in both documented and stripped variants. Even has a separate CSS class for Internet Explorer Mobile 7 (thanks, Microsoft). Supports offline caching and responsive features.

The Guardian Project has released the F-Droid Repository, a catalogue of F/OSS apps for Android. Their app makes it easy to browse the repository and install the listed software on your Android device.

Note: The "Allow install from non-market sources" option needs to be checked on your Android device.

vmdialer is a simple app that lets you operate a cellular modem (pre-paid or otherwise) from Virgin Mobile or Verizon on a Linux machine. The cell modem must be activated on a Windows machine before it'll function because the PROM has to be programmed with a special app, but once that's done you can use it with this app.

Note that the exact make and model is "Novatel Wireless MC760".

Kickstart is an HTML5 framework which makes it easier to build websites. It's a collection of HTML5, CSS, image elements,, and JavaScript templates which give you a head start on setting a page up. All you have to do is include two JavaScript files and a CSS file. Mobile friendly, too. Includes lots of different buttons, icons, and styles.

FrequencyCheck is a website that helps you determine if your current cellphone will work on the cellular networks of a particular country. You can either search for devices compatible with a particular carrier, or carriers compatible with a certain mobile device.

A web based XMPP client. Designed for multiuser chat. Tries to be be easy to customize and run. plugins and events. mobile aware. github repo. Join multiple MUCs, multiple private conversations. Notifications. Moderation mode. Requires that the server have HTTP bindings enabled.