ACE v1.25 by Offset is available. It is available in french, english, german and spanish (thanks to the translators). New features since v1.24 are :

• Added a splash screen to deal with plugins which are slow to initialize or activate/deactivate
• Added MagicBeacon notification support when making a screen grab
• Improved plugins API (v7) regarding mice and joysticks events (better plugins portability and efficiency)
• Clean up in plugins SDK (better documentation)
• Added analog joysticks support to plugins API (Amstrad Plus only)
• Upgraded mice and joysticks plugins to use the new plugin API
• Added info bulle to inform the user about mouse events being captured/released by a plugin
• Improved joysticks internal management to natively support Playstation, Xbox and generic gamepads layouts
• Improved joysticks plugins to handle combined (use one gamepad to control both CPC joysticks) and analog modes
• Minor fix in CRTC 0 and 2 emulation
• Minor fix in Gate Array emulation
• Updated Multiface Two plugin's icon (thanks to Christophe 'Highlander' Delorme)
• All plugins but joysticks are now automatically deactivated when selecting a quick prefs preset

A SDK exists if you want to program your own plugin for the ACE emulator.