Here's a list of tasks I intend to work on in mGBA, in a rough approximation of order:

Always Relevant

1. Log more things! Stalled
   
2. Test suite (Bug 182)
   
   1. Timing tests Stalled
      
   2. DMA tests Stalled
      
   3. Video tests Stalled
      
   4. Audio tests
      
   5. OOB ROM tests
      

1. Make a list.
   

1. SIO part 4
   
   1. Clean up GB multiplayer
      
2. Save profiles (Issue 106)
   
3. Multiple bindings (Issue 87) In Progress
   
4. Redo key mapping (unfiled) In Progress
   
5. XQ audio fixes/improvements Stalled
   
6. Debug suite (Bug 132)
   
   1. Memory viewer string editor
      
   2. Instruction-level debugger
      
   3. Improved frame inspector
      
   4. Scanline selection
      
7. Cheats part 4
   
   1. More cheat format loading (In Progress)
      
   2. Rearranging
      
   3. Expressive cheat format
      
8. Lua bindings (Bug 62)
   
9. Plugin system (Bug 111)
   
10. Game info window Stalled
    
11. Deferred cleanup
    
    1. Fix debugger overflow (unfiled)
       
12. Cheat search Stalled
    
13. Use results of video tests to fix outstanding graphical issues (Bug 9)
    
14. Python bindings (unfiled) Stalled
    
15. Support i18n (Bug 63)
    
16. More GB mappers
    
    1. TAMA5 Stalled
       
    2. MMM01 Stalled
       
    3. MBC6 Stalled
       
    4. HuC-1 Stalled
       
    5. HuC-3 Stalled
       
    6. Sachen
       
    7. Sintax
       
17. Programmable HUD/overlays (unfiled)
    
18. New software renderer (unfiled)
    
19. Chunked savegame flushing
    
20. Async VFile writes
    
21. Wii Port improvements
    
    1. Accel to fake gyro conversion
       
22. Extensible savestates
    
    1. Optionally store old audio data in savestate
       
23. Video filter support part 2
    
    1. Presets
       
    2. Layering
       
24. Port mGUI to SDL
    
25. e-Reader support (Bug 171) Stalled
    
26. Common Port improvements
    
    1. mGUI2
       
    2. Borders
       
    3. Gamma
       
    4. Axis mapping
       
    5. Improve scrolling Stalled
       
27. Rewrite RR
    

• Wireless adapter (Bug 166) Blocked
  
• Hardware-acceleration for 3DS (unfiled)
  
• SIO part 5
  • Get Multi Boot working in lockstep driver Stalled
    
  • Implement frame transfer SIO driver (unfiled)
    
  • Finish JOY bus (Bug 73) ETA Unknown - external factors Stalled
    
  • Implement mesh driver
    
  • Implement serial driver for Teensy bus
    
• Cloud saves
  • Dropbox integration
    
  • WebDAV/Nextcloud integration?
    
• Android support (unfiled)
  
• Android Leanback support (unfiled)
  
• DLDI/libfat support (unfiled)
  
• Video streaming (Bug 104)
  

• WASAPI support for Windows (unfiled)
  
• Formalize API
  
• Write API docs
  

The forums are still nascent, so suggestions for how to improve things are welcome, and encouraged! Post such suggestions here.

The rules on these forums are intended to be simple and clear.

1. Be civil. Not everyone has to get along, but if you intend to fight, don't do it here. Moreover, excessive outwards anger, swearing or hate speech may be considered uncivil as well.
   
2. No piracy. Do not post links to or upload illegal content, and do not request illegal content.