CREATE TABLE table_55886 ("Software" TEXT, "Latest stable date  ( version ) " TEXT, "Cost  (  USD  ) " TEXT, "Open source" TEXT, "License" TEXT)

Name the software with the latest stable date of 0.6.1
SELECT "Software" FROM table_55886 WHERE "Latest stable date (version)" = '0.6.1'
SELECT "Software" FROM "table_55886" WHERE "Latest stable date (version)" = '0.6.1'