Georg Rottensteiner C64Studio
Even in 2019, there is a IDE for C/64 which is still mantained! C64 Studio is a full .NET IDE which can connect to [Win]Vice for debugging.
It seems Deutsche guys are very strong on C/64 Developmenet on these days....
11.03.2019 - C64 Studio 6.0 C64Studio 6.0 is released:Source: Georg Rottensteiner - GR GamesAdd: Graphic screen editor paint tools Add: BASIC editor 80 char pos line Add: Allow changing of start address for BASIC Add: Save to File Manager Add: Real version number to properties/details Fix: Crash when deleting folder in Solution Explorer Add: Prepare file opened via context menu on !source PO Fix: Crash when unknown character encountered Fix: caret color detection Add: Support for alternative Debug.Log viewers Fix: Different post build commands for Win/Unix Fix: Resource leak in Hex sprite viewer Fix: Crash in sprite viewer Fix: Crash in macro viewer without active project Add: Support for GTK Vice' console window Fix: BASIC renumber bug (first token after line number went missing) Add: Opening of base libs via context menu Fix: Default graphic screen start size 320x200 Add: Debug Views (memory/register) color adjustable