rm's F-Droid repo

Combine synths and drum machines into scenes of music. Play them in order or pick and choose to make something new every time.

This is an homage to Caustic and a collection of ideas I've seen and had while making music over the years. You can sequence a song or play it live. Record your voice or instruments and export the whole song or separate stems.

• Synths and drum machines with up to 16 tracks
• Samplers and modelled acoustic instruments
• Piano roll and drum grid
• Automation and live performance controls
• Insert effects and send buses with sidechain support
• Audio recording and sample editing
• USB and Bluetooth MIDI with Ableton Link
• Export audio or MIDI and split songs into stems

Apogee is a physics sim. Build vehicles out of parts and take them wherever you want. Make a rover or a rocket. Fly a plane or take a submarine under the sea.

Explore freely in sandbox mode or unlock parts as you go in career mode. Do it with friends too. Build things together and come to each other's rescue.

• Build vehicles from parts with symmetry and staging
• Explore planets and moons with their own gravity and weather
• Fly aircraft or sail boats and dive in submarines
• Build bases on land or at sea
• Plan burns and use autopilot for flying and landing
• Crew who walk on other worlds and can be rescued
• Sandbox and career modes
• Multiplayer with a dedicated server option

BlokHead is an Android port of Blokout, based on the classic Blockout. It plays like the original with some tweaks to make it more customisable and quicker to play.

The graphics and controls have been redone for a touch screen. Play with on screen buttons, gestures or an external controller.

• Three block sets from flat to the full Blokout set
• Adjustable well size and depth
• Choose the starting difficulty
• Resize and move touch controls for either hand
• Gesture controls for moving and rotating blocks
• Bluetooth and USB controllers with remappable buttons
• High scores and sound effects

Start with a small town in 1900 and a few simple tools. As the years go by the town and everything that keeps it running gets deeper.

Wells give way to water mains. Streetcars give way to cars and back to transit. Low houses become something denser.

• Zones for homes and businesses from rural lots to towers
• Six eras with changing buildings and services
• Roads and junctions with traffic you can watch and fix
• Public transport with routes you plan stop by stop
• Power and water networks that need upkeep
• Town finances with bonds and a credit rating
• Public opinion and elections
• Weather and disasters with a chronicle of the town

Start in 1836 with horse-drawn wagons and a bit of money, and build railways, roads, canals and air routes between towns and industries through to now and past it. Carry people, mail and freight, keep things running through the winter, and try to stay ahead of the computer companies, or your friends.

• Maps in six Canadian regions, each with its own climate, and towns named in English or French
• Seasons and weather: snow that drifts and melts, lakes that freeze, ground that heaves in spring
• Trains with grades and grip, path signals, bridges, tunnels and electrification
• Roads from dirt tracks to highways, trams, buses and trucks by era, horse-drawn wagons early on
• Canals and locks, ferries and lakers, airstrips, seaplane bases and airports
• Industries that make and take cargo, loans, subsidies and a league table
• Up to 7 computer companies that you can compete with or buy out
• Goals, a campaign of seven chapters and a scenario editor
• Multiplayer over Wi-Fi or on a dedicated server
• Day length up to 16 times slower
• Packs for your own vehicles, buildings and industries

I wondered whether I could split a real song into stems and turn it into a decent MIDI file. So far the results are interesting but nowhere near good. The files tend to be too busy to be enjoyable. The original song is usually recognisable though.

It runs on your device after downloading a few models and a soundfont. Conversions take ten minutes or more on a midrange device. You can use it as is if you like but you have been warned.

• Split songs into six stems with Demucs
• Detect notes and chords with Basic Pitch
• Find drum hits and estimate tempo
• Guess the instrument for each stem
• Read MP3 and other audio formats Android can play
• Review instruments and note counts before export
• Keep converting in the background
• Built-in MIDI player with your own soundfonts

ParrotMetric is a parametric 3D modeller. Draw sketches with dimensions and turn them into solid parts. Every step stays in the history so you can change an early one and everything after it rebuilds.

It's made for designing things to 3D print. It works by touch and has mouse and keyboard controls too.

• Sketch constraints and dimensions
• Extrude and revolve sketches or sweep them along a path
• Round edges and shell or cut parts
• Mirrors and patterns with editable modelling history
• Parameters and configurations for variations of a design
• Check overhangs and thin walls before printing
• Import and export STEP and IGES files
• Export STL and 3MF for printing

Pick a root and a scale. ScaleInKey shows the notes and chords on a piano, guitar, ukulele or bass. Tap a note or chord to hear it.

There are 33 scales to choose from. There's also a simple chord progression sequencer so you can string some chords together and hear how they sound.

• 33 scales and modes
• Diatonic triads and seventh chords
• Piano and fretboard diagrams
• Chord fingering charts for guitar and ukulele
• Tap notes and chords to hear them
• Chord progression sequencer with looping and adjustable BPM
• Load your own soundfont

ScorchDroid is an Android port of Scorched3D, the 3D artillery game based on Scorched Earth. The entire engine was ported over so it plays like the original.

The UI has been redone for touch with sliders and buttons. Play against bots or with other people over Wi-Fi or Bluetooth. You can also join desktop servers running a compatible version.

• Destructible terrain and a shop full of weapons
• Wind and shields with bots to play against
• Touch controls and seven camera views
• Local multiplayer over Wi-Fi or Bluetooth
• Play on compatible desktop servers
• In-game chat and host admin controls
• Save and reload games including multiplayer
• Mod support with Apocalypse included

SnapRacers is a physics based kart racing game I put together for my son. The parts you use matter. They add weight, drag or power. Crashes knock parts off until you hit reset.

Race in grand prix cups or against friends in split screen or network multiplayer. Use the built in tracks or make your own with the track editor.

• Build your own karts from nearly 200 parts
• Stock karts and bikes to start from
• Nine grand prix cups and 36 courses
• Power-ups and crashes that knock parts off
• Time trials and practice runs
• Track editor and custom tournaments
• Share tracks and cups as files
• Split screen and network multiplayer

It's weird how hard it is to find a good, current, featureful, and free SSH client for Android. Here's one.

Whelk started as a replacement for JuiceSSH. It also does Mosh and Telnet. You can use it for USB and Bluetooth serial consoles too. I've added an SFTP browser and support for security keys.

• SSH and Mosh connections with Telnet too
• USB and Bluetooth serial consoles
• Saved connections and identities organised into groups
• Jump hosts and proxies
• SFTP browser and port forwarding
• Certificates and security keys with agent forwarding
• Searchable scrollback and a customisable extra keys row
• Encrypted backups and sync through a folder