• Java JRE 1.3.101 - A legacy Java runtime essential for early SDK dependencies.
• Qt Quick Components for Symbian - QML-based UI components for Symbian homescreen widgets.
• Symbian Xcode Plugin - GPL licensed Xcode plugin to enable Symbian development on macOS.

IDEs

• CodeWarrior Development Tools For Symbian OS Professional Edition v1.0 - Official development environment for Symbian until Carabide was released. Not recommended, prefer Carabide.

Device Specific Plugins

• E32Explorer - A tool that visualizes different parts of a Symbian OS E32Image, including preliminary support for the TRomImage format.
• RomBrowser - A utility for visualizing ROM dump contents. ROM images can be produced using [romdump](https://github.com/Florin9doi/romdump) or [SDumper](https://gitlab.com/tambre/rusty-starship/tree/master).

Device Specific Plugins

• Awesome J2ME - An awesome list about Java platform Micro edition[(J2ME)](https://en.wikipedia.org/wiki/Java_Platform,_Micro_Edition), a Java specification designed for old keypad phones and PDAs.
• Symbian Archive - Archive and website for Symbian related downloads.
• nnproject.cc - Website of nnproject. Curated list of Symbian and J2ME related resources.

Device Specific Plugins

• Symbian ToolBox - A collection of tools for Symbian devices, including a file explorer and an IRC client.
• OpenTTD Symbian Port - The port of OpenTTD for Symbian. Additional information is available through the [forum](https://www.tt-forums.net/viewtopic.php?t=35942).
• Dictionaries - A collection of open source dictionaries for Symbian OS.
• RotateIt - A screen rotation utility for Symbian devices.
• NanoCounter - A lightweight counter app for Symbian.
• CuteTube - A YouTube client for Symbian OS.
• QRemoteControl-Client - A remote control client application for Symbian.
• Star Browser - A Qt-based web browser for Symbian Anna/Belle.
• X-plore - Dual-pane file manager for Symbian with ZIP support and cloud integration.
• ProfiMail - Advanced email client supporting IMAP, SSL, and HTML rendering.
• FShell - Command-line shell for Symbian OS with scripting capabilities.
• FileList - Qt Quick app for browsing multimedia files and launching them in external apps (e.g., opening images in Photos).
• fahrplan - Public transport schedule viewer with offline support.
• internet-radio - Streaming radio player with playlist management.

Video Games

• Symbian C++ by А. Н Труфанов - A Russian book on C++ programming for Symbian 9.x, published in 2010.
• Step by step tutorial for your first Symbian Application - A tutorial to develop your first Symbian application.
• Create a sis app using python - A guide to create a .sis application using Python.
• Install a game on a N-Gage (Ru) - A tutorial for installing a game on a N-Gage.
• E32Image (.app) - File format specifications for the E32Image (.app) files.
• E32Image explanation - An explanation of the E32Image format.
• Symbian Sis file before Symbian 9.1 (.sis) - Details on the Sis file format prior to Symbian 9.1.
• Symbian Multibitmap (.mbm) - Information about the Symbian Multibitmap (.mbm) format.
• Symbian Application Information File (.aif) - Specifications for the Symbian Application Information File (.aif).

Device Specific Plugins

• Nokia 7710 Theme Studio - A dedicated theme making tool for Nokia 7710.

Device Specific Plugins

• r/Symbian - English language Symbian community on Reddit.
• Nokia N-Gage Discord - Active N-Gage community on Discord.
• Symbian World Telegram - One of the most active Symbian community on Telegram.
• EKAL21 - EKAL21 Discord server. Official link taken from the website.