melonDS vs MindSpark

melonDS is a free, open-source emulator focused on Nintendo DS emulation, with builds listed for Windows, macOS, and Linux. Its feature list includes a nearly complete CPU, video, and audio core, a JIT recompiler, an OpenGL renderer with 3D upscaling, joystick support, savestates, RTC, microphone, and lid controls. The project also lists DLDI support. Wi-Fi features include local multiplayer and online connectivity, but are a work in progress and may not work with all games. DSi emulation and GBA slot add-ons are also in progress. DS emulation requires configured BIOS and firmware files; DSi emulation additionally needs a DSi NAND image. melonDS uses raw save files and can import saves from DeSmuME, DraStic, or a flashcard, but does not support the special save memory type used by WarioWare DIY and Jam with the Band. Direct online connectivity requires libpcap or WinPcap, Ethernet, and administrator or superuser privileges; indirect mode does not require Ethernet or those privileges. The software renderer is more accurate but more CPU intensive, while OpenGL may be faster but less accurate.

MindSpark is an open-source mind-mapping app that runs in a browser or can be self-hosted. Its editor combines an infinite canvas with automatic layouts, keyboard-first editing, drag-and-drop reordering, search, presentation mode, and undo and redo. A Markdown outline and the map canvas stay synchronized as users edit either view. Research tools can fill citation details from Crossref using a DOI and export cited nodes as a references list. Users can compile a map branch into a prompt, estimate its tokens, and run it with their own Anthropic or OpenAI API key. MindSpark imports JSON, OPML, Markdown, GitMind, and MindMeister files, and exports PNG, PDF, JSON, Markdown, Word, and Mermaid. Self-hosted mode stores maps in SQLite and requires Node.js 22 or later; browser mode saves maps as private JSON files in a repository on GitHub, Gitea, Forgejo, or GitLab. The app is free with no feature gates or usage limits and is released under the MIT license.