sorry for my poor english!
I've written a new freebasic IDE is called -- poseidonFB
code by D programming language and IUP framework and based on Scintilla component
(Windows: D 1.076 + Tango 0.99.9 +IUP 3.27)
(Linux: D 1.074 + Tango 0.99.9 +IUP 3.27 )
PoseidonFB support:
1. Syntax highlighting
2. Project manager
3. Autocompletion & Calltip
4. Function / Type / Variable... treeview
5. Find / Replace in document or project
6. Jump to defintion
7. Utf-8/16/32 decode & encode
8. Debug
9. Compile / Quick run / Build project
10. etc......
It still in early beta stage but usable, please enjoy it!
Japanese translated intro: http://makoto-watanabe.main.jp/freebasic/tipsPoseidonFB.html
Japanese poseidonFB Language Pack: https://bitbucket.org/KuanHsu/poseidonfb/downloads/
Source Code: https://bitbucket.org/KuanHsu/poseidonfb/
Quick tutorial: http://www.freebasic.net/forum/viewtopic.php?f=8&t=23935&p=211429#p211429
poseidonFB Manual:https://bitbucket.org/KuanHsu/poseidonfb/downloads/
Download: Bitbucket Download -> Download repository
or
Win32:poseidonFB.7z V0.421(2019/09/07)
Linux 64bit:poseidonFB_x64 V0.421(Built and tested at Linuxmint 17.3 64bit, Linuxmint 18 64bit)
Need install the IUP libs:https://sourceforge.net/projects/iup/files/3.27/Linux%20Libraries/
Install modified iup_scintilla: ( Linux )
poseidonFB use modified libiup_scintilla.so for correct code folding, it can be download from https://bitbucket.org/KuanHsu/poseidonfb/downloads/, extract libiup_scintilla.so to /usr/lib/ (need admin)
AppImage package which pack IUP and modified IUP_scintilla, it can be downloaded at bitbucket
Window 7:

Linux 64:( Linux Mint 18.3 Cinnamon 64bit )

( V0.421: Fixed "end extern" bug; fixed "Find/Replace In Files" not work in new document; expand plugin method )
( V0.420: Fixed after a parenthesis, keyword autocomplete fail )
( V0.419: Reopen "Fullscreen" on linux; fixed open "Debugger / Manual Path" crash bug )
( V0.418: Added "Create New Doc With BOM" option; modified "Before Compile, Delete Existed Execute File"; modified to enable if "Quick Run" create execute but got erroe/warning message, try to run it )
( V0.417: Fixed Appimage load ini bug; change linux default font to Monospace; added Terminal Path for linux )
( V0.416: Fixed color templates save bug )
( V0.415: Changed color templates *.xml to *.ini; added "Save" button in ColorTemplates; enabled ColorTemplates on linux version )
( V0.414: Fixed autocomplete with tab key fails; modified code for linux AppImage pack )
( V0.413: Fixed crash of close dialog; fixed DnD not work issue for IUP 3.27 )
( V0.412: Fixed QB-IDE keyword case convert issue while only one keyword at line 1 )
( V0.411: Modified keyword case convert; added QB-IDE keyword case convert; cancel "Function Title" width; updated IUP 3.27 )
( V0.410: Modified codecompletion bug while "Auto Convert Keyword Case" is ON )
( V0.409: Modified parser bug -- ".keyword / ->keyword"; try to fix crash bug )
( V0.408: Fixed NAMESPACE codecomplete crash bug; modified "Keyword Case Convert" )
( V0.407: Added "en-Keyboard layout" option; modified divide-word rule while using "Show Type" or "Jump Definition )
( V0.406: Modified parser, to added "Naked" keyword and fixed "Sub" keyword in asm )
( V0.405: Added "Miscellaneous" in "Project" panel )
( V0.404: Added "EXTRAASCENT" and "EXTRADESCENT" at "[size]" in editorSettings.ini )
( V0.403: Fixed critical crash bug while both Codecomplete & Calltip threads running at same time; modified "Search/Replace" to change "Function Title" and auto expand )
( V0.402: Fixed "Compile & Run" bug )
( V0.401: Focus last edited document while using "Load Previous Document"; fixed Ctrl+L-Click to add breakpoint on margin in Windows )
( V0.400: Updated to IUP 3.25; added "Close Right" )(Need update all *.xpm)